312 
INDEX. 
Riemsdyk, fusion pyrometer of, 39. 
Ring- burner of Dr. Gibbs, 85, 89, 90. 
Roberts, fusion experiments of, 39. 
Rosetti on solar temperature, 45. 
Rbunia tests Wallaston's method. 170. 
Reverberatory furnace for zinc, 64. 
Revolving muffle furnace, 180. 
advantages of, 185. 
S. 
Saintignon, circulating water pyrometer, 43. 
Sajotschewsky, vapor tension studied by, 38. 
Salleron, calorimetric pyrometer of, 41. 
Salts, specific heat of, by Ehrhartlt, 42. 
Saxon porcelain works, apparatus of, 21. 
Scala graduum caloris, 43. 
Schinz, calorimetric pyrometer of, 41. 
pyrometric work of, 32,33. 
displacement pyrometry of, 36. 
heat conduction pyrometry of, 42,43. 
thermo-electric pyrometry of, 48. 
re-entrant air thermometer of, 48. 
Schinz's torsion galvanometer, 104. 
Schleiermacher tests Stefan's law of radiation, 44. 
resistance pyrometry of, 51. 
Schneebeli tests Stefan's law of radiation, 44. 
Schneider, calorimetric table of, 11. 
Schubarth, calorimetric pyrometer of, 41. 
Schumann on transpiration of gases, 241. 
on condensation of gases by solids, 301. 
Schwarz, calorimetric pyrometer of, 40. 
Secchion transparency of metals, 164. 
Seger studies fusion of siliceous mixtures, 40. 
Selenium, boiling point.of, 34. 
Series of thermo-couples, 57. 
of alloys, 79. 
Shaw, pyrometers classified by, 23, 27. 
vapor tension studied by, 38. 
Siemens, resistance measurements of, 26. 
calorimetric researches of, 41. 
Siemens' s pyrometer, 33, 51. 
Silbermann and Jacquelin, air thermometer of, 
28. 
Siliceous mixtures for fusion work, 40. 
Silicification of platinum, 187. 
Siphon Daniel 1,99. 
Sliding coefficient, 276,302. 
Solar temperatures, 45. 
Soldering of porcelain, 31, 175. 
Solids, dilatation of, 25. 
Solly, thermo-electric pyrometer of, 48. 
Soret, temperature of the sun measured by, 45. 
Specific heat, pyrometers based on, 40. 
Sprengel pump vised by Deville and Troost, 34. 
Spring on wire drawing, 170. 
Springmuhl on transpiration of gases, 241. 
Standard cells, temperature coefficient of. , 102. 
Standardization by comparison, 22, 237. 
of constant pressureair thermometer, 212. 
Stas photometric pyrometry discussed by, 46. 
Steam, superheated, used in displacement ther- 
mometer, 166. 
Stefan, law of radiation of, 44. 
transpiration work of, 47. 
flow of viscous liquids, 211. 
on transpiration in short tubes, 285. 
v. Steinle and Hartung, graphite Dvrometerof, 
27. 
Stenger, radiation work of, 46. 
Stokes on viscosity of air, 24U. 
flow of viscous liquids, 241. 
on transpiration in short tubes, 285. 
Strouhal, Vincent, aids research, 17, 18. 
electrics of steel, 144, 149, 159. 
improved thermo-electric apparatusof, 97, 98J 
de St. Venant on transpiration in short tubes, 
285. 
Substances for boiling points, 119. 
Summary of results for large vapor baths, 79. 
Sulphur, small form of vapor bath for, 85. 
vapor bath, constant temperature of, 107. 
Sun, temperature of, 45. 
T. 
Table for (l+Bt)/(l+at),212. 
of errors in constant pressure air thermom- 
etry, 229. 
Tables, list of, 11, 12, 13. 
Tait, thermo-electric researches of, 49. 
silicification of platinum, 187. 
Temperature, how computed thermo-electri- 
cally,71. 
coefficient, how measured, data, 139. 
coefficient of standard cells, 102. 
coefficient and resistance, 127. 
coefficient, zero value of, 161. 
effect of, on wide tube transpirations, 297. 
Temperatures, constancy of, in boiling tubes, 104. 
equality of, tested thermo-electrically, 67. 
Tenacity of thermo-couples, 53. 
Thermal conductivity, pyrometers based on, 42. 
Thermo-couples, list of, 68. 
Thermo-couple of platinum and platinum, 81. 
Thermo-electric pyrometry, advantages of, 52. 
pyrometers, 48. 
anomalies, tests for, 80. 
computation, 103. 
work, galvanometer measurement, 104. 
calibration, practical data for, 110. 
constants, time variations of, 116. 
datum for fused platinum, 124. 
equation, insufficiency of, 125. 
Thermo-electrics of platinum alloys, 135. 
Therm oscopes, classified by Thomson, 25. 
magnetic, 52. 
Thermostat and transpiration pyrometer, 305. 
Thomson, James, equation of, 22. 
Thomson, J. J., resistance pyrometry of, 52. 
Thomson, Sir William, article "Heat" of, 23, 25. 
classifies pyrometers, 25. 
vapor tension thermometer of, 38. 
viscosity pyrometer of, 46. 
thermo-electric diagram of, 49. 
magnetic therm oscope of, 52. 
Tidblom, thermo-electric formulae of, 50. 
Time variations of thermo-electric constants, 116. 
Tin, boiling point, experiments on, 123. 
Torsion galvanometer for high temperature 
measurement, 22. 
for thermo-electric work, 104. 
Transparency of metals, 164, 
