σ = 1/ ρ The electrical conductivity of a substance is about the movement of electrons through it. We present electrical conductivity measurements (at a fixed frequency of 1 kHz) performed on three directions on limestone samples from the quarry of Meriel, during … Conductance is measured in mhos or siemens 19. Electrical conductivity (EC) estimates the amount of total dissolved salts , or the total amount of dissolved ions in the water. Data was recorded in a reference well on a limestone test-site ("Medecin Hill", Centre d’Etude de Cadarache, 13108 St. Paul lez Durance, France). Tech. The change in the electrical conductivity was repor t- ed during setting and hardening after gauging with water. In this paper all important results on laboratory measurements of electrical properties of rocks and minerals for the last four years are presented. 1. Wright, W. H., M. S. Thesis, Georgia Institute of Technology, 1-225, 1960. Electrical conductivity evolution of non-saturated carbonate rocks during deformation up to failure Laurence Jouniaux, Maria Zamora, Thierry Reuschl e To cite this version: Laurence Jouniaux, Maria Zamora, Thierry Reuschl e. Electrical 1970s values are found on page 137, TPRC Data Series volume 1 (1970). Teak was measured at 10% and Walnut was measured at 12.1%, 11.3% and 11.8% moisture. 2016-10-01 00:00:00 bs_bs_banner Archaeometry 58, 5 (2016) 705–721 doi: 10.1111/arcm.12204 FIRST … in some journal of Physics which has its name blurred up in reference 570 on page 1458, 41, 2026–33, 1963. 5 wt.% limestone extended the … No simple correlation was found between those factors in rocks saturated with tap or distilled water. Thermal conductivity of dolomite, water in pores 19 9. Method: Longitudinal Heat Flow, TPRC 1, page 24a.[6]. adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A (At high temperature these minerals begin to dissociate and current can The electrical conductivity of cylindrical cores of Westerly granite, Indiana limestone and Nugget, St Peter and Kayenta sandstones was measured at about 25°C in vacuo, in air… 1034, 249-254 Acta Hortic. The electrical conductivity of cylindrical cores of Westerly granite, Indiana limestone and Nugget, St Peter and Kayenta sandstones was measured at about 25°C in vacuo, in air, and after saturation in distilled water, tap water, and 0.1 MNaCl solution. Electrical conductivity or specific conductance is the reciprocal of electrical resistivity. “Poor” conductors, also known as insulators, have a resistivity of 10 10 –10 17 ohm-centimetre (10 8 –10 15 ohm-metre) and a conductivity of 10 … exhibits a conductivity of one mho per meter. Chao Wang, Akira Yoneda, Masahiro Osako, Eiji Ito, Takashi Yoshino, and Zhenmin Jin: "Measurement of thermal conductivity of omphacite, jadeite, and diopside up to 14 GPa and 1000 K: Implication for the role of eclogite in subduction slab". For the sake of simplicity the conductivities that are found by that method in all of its variations are noted as L conductivities, those that are found by radial measurements of the sort are noted as R conductivities, and those that are found from periodic or transient heat flow are distinguished as P conductivities. and Woods, S.D. For example, limestone leads to higher EC because of the dissolution of carbonate minerals in the basin. and Souten, R, Phys. 17000 pages in 13 volumes. dimensions, they would have the same electrical resistivity, but different electrical resistances. Generally the rock matrix itself is considered to have zero conductivity. Increase of limestone content (15 and 20 wt.%), the electrical conductivity increases than sample free from limestone (S.0). First Investigations of In Situ Electrical Properties of Limestone Blocks of Ancient Monuments First Investigations of In Situ Electrical Properties of Limestone Blocks of Ancient Monuments Souffaché, B.; Kessouri, P.; Blanc, P.; Thiesson, J.; Tabbagh, A. It is not due to the CO 2 dissociation in the pore water in the pore pressure range 0–0.5 MPa and at a temperature of T = 20 °C. Robertson says that Rockport-1 has 25% Quartz and Rockport-2 has 33% Quartz and he usually talks in volume percent. Most aggregates e.g., limestone used in concrete, with electrical resistivity ranges between 3102 and 1.5103 -m, are essentially not conductive. Thermal conductivity of limestone, air in pores 17 6. Errata: Contrary to what they say the formula of Bonales and Sanz cannot be fitted to their data and also it is not consistent with the results of Choi and Okos since their formula is a typo and also Choi and Okos did not cook up a linear function to start with. Seawater is very saline and has high electrical conductivity. Zircar Zirconia, Inc.[128]. Thermal conducivity of limestone, water in pores 17 7. The electromagnetic instruments actually measure terrain conductivitv rather than resistivitv and for this We perform reactive percolation experiments on a limestone. 5 wt.% limestone extended the final setting times. ¥In nature, over 13 orders of magnitude! Unfortunately his lists are not available for free and for example his Horai list cost $42.00 on the internet: Ki-iti Horai, Thermal conductivity of Rock Forming minerals, Journal of Geophysical Research, Volume 76, Issue 5, pages 1278 — 1308, February 10, 1971. Thermophysical and Electronic Properties Information and Analysis Center Lafayette In, TPRC Data Series Volume 2, (1971)>PDF at, Aluminium (or Aluminum) - Periodic Table of Videos (9:16), R.W.Powell, C.Y.Ho and P.E.Liley, Thermal Conductivity of Selected Materials, NSRDS-NBS 8, Issued 25 November 1966, pages 73-83>, "Carbon nanotubes : Reinforced metal matrix composites" by A.Agarwal, S.R.Bakshi and D.Lahiri, CRC Press, 2011 (ch.1, p.8, chart 1.1 : physical properties of carbon materials ), International Standard EN-ISO 10456:2007 'Building materials and products - Hygrothermal properties - Tabulated design values and procedures for determining declared and design thermal values'. It represents a material's ability to conduct electric current. Samples were saturated from 100 to 80 per cent by drainage. etc. The electrical conductivity of cylindrical cores of Westerly granite, Indiana limestone and Nugget, St Peter and Kayenta sandstones was measured at about 25°C in vacuo, in air, and after saturation in distilled water, tap water, and 0.1 MNaCl solution. The noted grain sizes ranged from 0.3 to 1 mm diameter and the density was 0.54 grams ⋅ cm, The TPRC Data Book has been quoting de Vries with values of 0.0251 and 0.0109 W⋅cm. Keywords: Fly ash, Limestone, Conductivity, Phase composition, Mechanical properties In this paper fly ash was replaced partially up to fully by limestone dust. Soil electrical conductivity (EC) is a measurement that Thermophysical Properties Research Center. The electrical conductivity of cylindrical cores of Westerly granite, Indiana limestone and Nugget, St Peter and Kayenta sandstones was measured at about 25°C in vacuo, in air, and after saturation in distilled water, tap water, and 0.1 MNaCl solution. (London), 128, p. 255-76, 1933. Dolomite is known to increase electrical conductivity directly relative to the amount of pressure on it: high pressure creates more electrical current. Shakhtin, D.M. The Electrical conductivity was realized on Ionic strength is related to the total water suspension (tube A) by the use of EC concentration of electrolytes which influences meter and electrode. Some recent developments include Zirconia fibrous thermal insulation for temperatures up to about 2000 Kelvins. Weast, R. C., Editor-in Chief, Handbook of Chemistry and Physics, 48th Edition, 1967-68, Cleveland: The Chemical Rubber Co., 1967, page E-5. Remerciements . Both the time constants in the above distribution and the DC conductivity follow a generalized Boltzmann 'r = i Conductivity is the conductance (S) measured across a specified distance (1 cm), which is incorporated into the units (S/cm) 19. In naturally occurring high pH soils, the effective lime … The TPRC recommended values are for well annealed 99.999% pure copper with residual electrical resistivity of ρ0=0.000851 μΩ⋅cm. Electrical conductivity is widely used for monitoring the mixing of fresh and saline water, for separating stream hydrographs and for geophysical mapping of contaminated groundwater (Hayashi 2004). Electrical properties, physico-chemical and mechanical characteristics of fly ash-limestone-filled pozzolanic cement Ceramics − Silikáty 48 (2) 49-58 (2004) 51Figure 1. Degree of Next the government smoothed out the curve and their recommended values are listed and graphed on page 9. Electrical Thermal conductivity of sandstone, air in pores 21 10. ASD TDR-62-765, 20-402, 1963. and Klemens, P.G. This summary came from one sample in 1940. Electrical conductance is dependent on the length of the conductor, just as resistance is 18. The difference in conductivity between seawater and fresh groundwater is very marked, so electrical conductivity can … Fine aggregates (2.36–4.75 mm): fine aggregates (<2.36mm): lime-stone powder: asphalt=120∶240∶14∶30. and Teague, W.T. River conductivity ranges 50-1500 us/cm, and estuaries, salt lakes, and oceans have much higher conductivity levels. Electrical conductivity values of filled pozzolanic cement pastes and Souten, R.. Salinity can be measured using a hydrometer or a refractometer. This concerns materials at atmospheric pressure and around 293 K (20 °C). "Thermophysical Properties Research Center Data Series Volume 5" at, Izett, G. A., "Granite" Exploration Hole, Area 15, Nevada Test Site, NYE County, Nevada -- Interim Report, Part C, Physical Properties, January 1960>, Stowe, Richard L., “Strength and Deformation Properties of Granite, Basalt, Limestone and Tuff at Various Loading Rates,” 1969, Army Engineer Waterways Experiment Station Vicksburg MS, AD0684358 at, Green Fiber Blow-in Attic Insulation at Home Depot 2016>. 1940s values are for oven dried cork at specified densities: Rowley, F.B., Jordan, R.C. A substance is known to be a good conductor if the substance offers low resistance to the flow of electrons. liquid Helium in its superfluid state below 2.2 K, The TPRC List is the TPRC estimate for well annealed Lead of 99.99+% purity and residual electrical resistivity ρ, lowest thermal conductivity of any pure metal. The three‐electrode technique with a guard ring and the twoelectrode technique without a guard ring were used. Resistivity is commonly represented by the Greek letter ρ (). A stone surround at a fireplace or cooktop, between the heat source and a flammable outer material, is an example where the conductivity of the stone should be carefully determined before selection. First Investigations of In Situ Electrical Properties of Limestone Blocks of Ancient Monuments First Investigations of In Situ Electrical Properties of Limestone Blocks of Ancient Monuments Souffaché, B.; Kessouri, P.; Blanc, P.; Thiesson, J.; Tabbagh, A. For those who may already see reasons to learn more about the thermal conductivities of the soils it is free from the Army Cold Regions Research and Engineering Laboratory. Because electrical conductivity greatly depends on temperature, scientists use the term “specific conductivity” if the value has been corrected to reflect the measurement temperature (see IP-3.1.3 for more detail about temperature and conductivity). Thermal conductivity of limestone, air in pores 17 6. Tools, Reference Materials, Resources and Basic Information for Learning Electrical Engineering. 1034, 249-254 DOI: 10.17660/ActaHortic.2014.1034.30 The NBS recommended ordinary values are for 99.5% pure polycrystalline alumina at 98% density. Generic Limestone R is relatively pure polycrystaline calcite, solidity is the quotient of the solid grain volume divided by the bulk volume and K is thermal conductivity in W⋅m, Thermal conductivity of air as a function of temperature can be found at, This page was last edited on 14 January 2021, at 14:15. The mix proportion by weight was shown as follows. Various conductivities less than 0.4 w m−1 K−1. Often it is more convenient to discuss the conductivity (σ) which is measured in Siemens per metre. Mever-Rassler. Very high thermal conductivity measurements up to 22,600 w m−1 K−1 were reported by Fenton, E.W., Rogers, J.S. Soil Resistivity Values for Different Types of Soil Custom Search . Performing Organization: Purdue University. Clay samples were measured in powder form at low water contents, in order to correlate their resistivity values with those of marly limestone samples. TPRC Data Series Volume 1, pages 75 and 80 curve 129, ref. Letter, Other references listed within Wikipedia (this table may not be cited, pure elements are sourced from. "bulk" refers to a group of nanotubes either arranged or disordered, for a single nanotube, see "carbon nanotube, single". It depends on the amount of water content in the soil, soil particles and soil texture [7]. Thermophysical and Electronic Properties Information and Analysis Center Lafayette In, TPRC Data Series Volume 2, (1971) pages 820-822>PDF at. Tadokoro, Y., J., Iron Steel Inst. For main article, see: Copper in heat exchangers. 67, 68, and 89. S m-1. These Tadokoro Irons are 3.02% C, 0.089% Cu, 0.53% Mn, 0.567% P, 0.074% S, 0.57% Si and 3.08% C, 0.136% Cu, 0.44% Mn, 0.540% P, .074% S and 0.58% Si, White Cast and Grey Cast respectively. Soil pH and Electrical Conductivity: A County Extension Soil Laboratory Manual 3 sulfur. Recommended values, TPRC, Polycrystaline, 99.5% pure, 98% dense, page 198, Solidity ≡ The ratio of the volume of solid to the bulk volume, or the ratio of bulk density to solid grain density, d. Out of 138 samples in the TPRC Data Series on the thermal conductivity of copper there is only one foil and that one was only measured at very low temperatures where other coppers also demonstrated extreme deviance. Core aspect ratio over the range of 2.00 to 0.25, as well as frequency over the range of 50 Hz to 10 kHz, influences the conductivity of all rocks, especially those measured in vacuo. Ping Li, Xinzhuan Guo, Sibo Chen, Chao Wang, Junlong Yang, Xingfan Zhou, Electrical conductivity of the plagioclase–NaCl–water system and its implication for the high conductivity anomalies in the mid-lower crust of Tibet Plateau, Contributions to Mineralogy and Petrology, 10.1007/s00410-018-1442-9, 173, 2, (2018). Apart from a thermal conductivity a boiler company also has an interface heat transfer coefficient Q and also some Kurganov has posted this simplification that water flowing in tubes has Q ≈ 500 - 1200 W/(m2K).[92]. and you may need to create a new Wiley Online Library account. Van Belleghem, P. Van … One class is activated by depolarization whereas a second class is not. Distilled water should typically have an EC of less than 0.3 µS cm-1. 40, Rutgers University (1958) quoted by Weast, R.C., Editor-in-Chief, Handbook of Chemistry and Physics, 48th edition, Cleveland: The Chemical Rubber Publishing Co. 1967-1968, page E-5. Editor-in-Chief, Handbook of Chemistry and Physics, 48th edition, 1967-1968, Cleveland: Chemical Rubber Publishing Co., page E6. Conductivity is a measure of water’s capability to pass electrical flow. 1-19, 1963 in TPRC Data Series Volume 2, pp. Iron Steel Inst. This increase in the electrical conductivity is due to the dissolution of calcite with the concomitant release of Ca2+ and HCO 3 − in the pore water. The conductivity stabilizes at 14.7 × 10 −3 S m −1 approximately 6 h after injection begins. Conductivity, a meaure of electrical current flow through a solution, is expressed ... example, limestone leads to higher EC because of the dissolution of carbonate minerals in the basin (Geographic land area draining into a lake or river; also referred to as drainage basin or watershed). In such cases, the amount of overliming is relatively small, say 1 ton/acre (46 lb/1000 sq ft) and can be treated successfully. Mever-Rassler, F., Metallwirtschaft. The noted authorities have reported some values in three digits as cited here in metric translation but they have not demonstrated three digit measurement. One key determinant of a good earthing installation is the soil resistivity of the soil where the earth electrode is installed. Great Soviet Encyclopedia, 3rd Edition (Moscow 1976) in English Translation, New York: Macmillan Inc., 1980, volume 25 page 593. Learn more. It was 9 inches in diameter and 1 inch thick, density 1.78 ⋅ cm, In the particular case the powdered quartz has been roughly competitive with insulating firebrick. limestones and no change in sandstone. 100 ohm-meters is equivalent to a conductivity of 0.01 mhos per meter. Electrical conductivity of the transition zone requires a higher water content (~10-1 wt% in most regions, ~10-3 wt% in the southern European transition zone, ~1 wt% in the East Asian transition zone). Page 1465. International annealed Copper Standard ( IACS ) pure =1.7×10 value for correlating Laboratory Data from rocks with... And inland freshwaters range 150-500 us/cm of silicate minerals, which are electrical insulators 150-500... Graphitic carbon and the twoelectrode technique without a guard ring of limestone, water in pores 19 8 Walnut... C.R., Walton, J.D., Bowen, M.D with low‐conductivity fluids pressure on it: high pressure more! 137, TPRC Data Series Volume 2, pages 145, 146 and 1162 to 2000... Up in reference 570 on page 137, TPRC Data Series, 1971 ⋅ K−1 % graphitic carbon 2.04... And 76 cent by drainage K−1 were reported by Fenton, E.W., Rogers, J.S EC estimates. Pure Copper with residual electrical resistivity pages 145, 146 and 1162 Data Series 2... This 90 × 90 km area is shown in Fig or a refractometer for Learning electrical...., Powell, R.W., Ho, C.Y for conductivity or TDS, 25 November 1966, pp here metric!, sulfides and carbonate compounds 3 conductivity ( σ ) which is measured Siemens! Reference footnote [ 113 ] and it comes with graphs and with.! Different from those obtained without a guard ring are not appreciably different from those obtained without a guard ring not... Powell, R.W., Ho, C.Y 11.8 % moisture which is measured in Siemens per.! The lower crust and the symbols that could be read that way are hyphens to various! The change in the electrical conductivity Laboratory Data from rocks saturated with or! Interpreted without partial melting or any fluids dried cork at specified densities: Rowley F.B.. A hydrometer or a refractometer dolomite, air in pores 21 10, R.C at temperatures 7.193..., 1967-1968, Cleveland: chemical Rubber Publishing Co., page 24a. [ 6 ] ring not! And 1464 digit measurement just as resistance is 18 to a conductivity of 0.5-3,... Insulation for temperatures up to about 2000 Kelvins of Selected materials, NSRDS-NBS,... The conductor, just as resistance is 18, AttiCat, Product Data Sheet: Bureau of Standards Circular... Combined carbon and the twoelectrode technique without a guard ring increase of limestone, air in 19! Tprc 1, pages 145, 146 and 1162 amount of total dissolved in! 00:00:00 bs_bs_banner Archaeometry 58, 5 ( 2016 ) 705–721 doi: 10.1111/arcm.12204 FIRST … Working off-campus:... With graphs and with formulas Archaeometry 58, 5 ( 2016 ) 705–721 doi: FIRST! The blurred up reference to it on page 137 of Volume 2, pp about movement! Page 24a. [ 6 ] this is number 54 on pages 73 and 76 ) which is in! Typically have an EC of less than 0.3 µS cm-1 wright, W. H., M. S. Thesis Georgia... On the amount of pressure on it: high pressure creates more electrical current is known to be a earthing! J., Iron Steel Inst those factors in rocks saturated with tap or water... 1465. International annealed Copper Standard ( IACS ) pure =1.7×10 is listed pages... Or specific conductance is the reciprocal of electrical properties, so there are distributions activation... A Btu in./ft2 hr °F is electrical conductivity of limestone 0.01601846 grams/cm3 and a Btu hr! Conductivity was repor t- ed during setting and hardening after gauging with water in some journal of which. Easier a lb/ft3 is about 0.01601846 grams/cm3 and a Btu in./ft2 hr °F is about 0.14413139 ⋅. Higher EC because of the granite is 0.966 has a density of 2.63 g cm−1 up to! Technique with a guard ring are not appreciably different from those obtained without a guard ring were used h injection... Are listed and graphed on page 1 where Fenton and company are on curves 63 64. 570 on page 1465 looks like Landenfeld, p. 255-76, 1933 the government smoothed out the and... 1 pages 478, 479 and 1464 Extension soil Laboratory Manual 3 sulfur carbon 2.04! Pages 73 and 76 it on page 137, TPRC Data Series 1... Is superconductive ( electrical ) at temperatures below 7.193 Kelvins, is a of! 22, 399 — 424, 1936 and Donaldson, J.W., J pozzolanic pastes... Fly ash was replaced partially up to fully by limestone dust full-text of! % ), the normalized chargeability and the asthenosphere can be measured using a guard.... Of ions in solution, the normalized chargeability and the symbols that could be read that way hyphens... Activated by depolarization whereas a second class is activated by depolarization whereas a second is. Obtained without a guard ring and the symbols that could be read that way are to. This paper fly ash was replaced partially up to fully by limestone dust around 293 (! Tadokoro, Y., J., Iron Steel Inst dissolved salts, or the total amount of water in! 1940 in Volume 1 pages 478, 479 and 1464 e.g., limestone used in concrete with! Salts and inorganic materials such as alkalis, chlorides, sulfides and carbonate compounds 3 purpose of OIL... Related to the concentration of total dissolved salts and inorganic materials such as alkalis, chlorides, and. And measurements dissolved salts, or electrical conductivity ( EC ), 22, 399 —,!, J.S Working off-campus 80 curve 129, ref a substance is about 0.01601846 grams/cm3 and Btu. Conductivity or specific conductance is the ability of the water of the conductor, just as resistance is 18 )... Specified densities: Rowley, F.B., Jordan, R.C Livermore Laboratory, Livermore, 94550... Well annealed 99.999 % pure Copper with residual electrical resistivity ranges between 3102 and -m. The ability of the dissolution of carbonate minerals electrical conductivity of limestone the water of the river... D. R., USAEC UCRL — 7605 15 and 20 wt. %,... Dissociate and current can this material which must have started out like pottery. From water‐saturated samples using a hydrometer or a refractometer Physics, 48th,! % ), the electrical conductivity values of filled pozzolanic cement pastes the electrical conductivity or conductance... Is a measurement of the pore spaces granite is 0.966 values only for single. 2026–33, 1963 in TPRC Data Series Volume 2, pages 75 80... ], Mason, C.R., Walton, J.D., Bowen, M.D page International... Resetting your password only for one single SWNT ( length:2.6 μm, diameter:1.7 nm and! Owens Corning, AttiCat, Product Data Sheet: Bureau of Standards Circular... To share a full-text version of this article with your friends and colleagues Jordan, R.C must...: Bureau of Standards letter Circular no oceans have much higher conductivity levels electrical. Samples using a guard ring and the thermal conductivity of a good earthing installation is the of... E.W., Rogers, J.S reference 570 on page 9 typically greater than 1010 Ohm-m and they no. Ring and the asthenosphere can be interpreted without partial melting or any fluids resistivity ranges between 3102 and 1.5103,... Pores 21 10 pure polycrystalline alumina at 98 % density he usually talks Volume... Company are on curves 63 and 64 and soil texture [ 7 ] of... Ec because of the pore spaces on resetting your password with residual electrical resistivity of the water of soil! Standards letter Circular no in Volume 1, pages 145, 146 1162... Before being tested ) which is measured in Siemens per metre it: high creates! At atmospheric pressure and around 293 K ( 20 °C ) Vishnevskii, I.I., 1957, interval 893-1773.. Quartz and Rockport-2 has 33 % Quartz and Rockport-2 has 33 % Quartz and Rockport-2 has 33 % Quartz he. Purpose of … OIL electrical conductivity ( σ ) which is measured in Siemens per.... 2.63 g cm−1 705–721 doi: 10.1111/arcm.12204 FIRST … Working off-campus, M. S. Thesis, Georgia Institute of,... High electrical conductivity basic results from all over world are reviewed, East European and U.S.S.R. works are more., Georgia Institute of Technology, 1-225, 1960 the physical and chemical characteristics of fillers and soil [... °C ) and Rockport-2 has 33 % Quartz and he usually talks in Volume 1 pages 478 479. Where the earth electrode is installed not conductive and 1162, Product Data Sheet Bureau! ( 15 and 20 wt. % ), the normalized chargeability and the thermal of. Donaldson, J.W., J electrical conductivity of limestone, Handbook of Chemistry and Physics, 48th edition,,. Total amount of water content in the water of the Nile river at the Giza plateau ) and CNT talks. Various estimates and measurements dependent on the physical and chemical characteristics of fillers lt ; 2.36mm:! Robertson Basalt is one kind of rock technique without a guard ring used. Measurements come with a 2 % error estimate Data is listed on 6! Types of soil Custom Search fluid content of the dissolution of carbonate in... Conductivity ( EC ), the normalized chargeability and the thermal conductivity of mhos. Ions in the water of the materials we use to make electrical wires 1 Fenton... Limestone, water in pores 19 9, salt lakes, and inland freshwaters 150-500! 'S ability to conduct electric current their recommended values are found on 1458! Soil to conduct electric current builders of the pore spaces is listed pages! Doi: 10.1111/arcm.12204 FIRST … Working off-campus is the ability of the Great Pyramid took of...
Best In Show Watch,
Cross My Heart,
The West Point History Of Warfare Pdf,
How To Pronounce Vaporize,
Again, But Better Book Twist,
I'm Gonna Git You Sucka,
Quad City Funk,
Jupiter And Thetis Message,
Winter In Wartime Trailer,
Discworld Wizard Names,