INDEX. 
309 
Dilatation of solids, 25. 
of gases, 27. 
of liquids, 27*. 
Dimensions of capillary tubes, 171. 
Disintegration of platinum at high temperatures, 
276. 
Displacement methods of air thermometry, 36. 
air thermometer, 165. 
Disposition of air thermometric apparatus, 187. 
Dissociation of iodine, 24. 
pyrometry, 38. 
effect of, on viscosity, 279. 
transpiration method for, 305. 
Dixon graphite, crucible of, 73. 
Draper, law of radiation of, 43,46. 
Dumas, vapor density method of, 29. 
Duration of continuous ebullition, 116, 118. 
Ebullition, use of, in pyrometry, 42. 
plane of, 108. 
continuous, duration of, 116, 118. 
Elasticity, phenomena of, 17. 
Electrical conductivity, pyrometers based on, 50. 
Electric phenomena in furnace, 233, 234. 
Ellieot, dilatation thermometer of, 25. 
Elliott, standard cell of, 100. 
Elster and Geitel on disintegration of platinum, 
276. 
Erhardt and Schertel measure melting points of 
alloys, 34. 
fusion experiments of, 40. 
Erhardt, calorimetric work of, 42. 
Erhardt and Schertel test Jolly's air thermome- 
ter, 208. 
Ermann and Herster, air thermometer of, 28. 
Errors of constant volume air thermometer 
formula?, 190, 195. 
simplified formulae, 214. 
of viscosity measurements, 274. 
v.Ettinghausen measures temperature Coefficient 
of Latimer Clark's cell, 102. 
Expansion of solids, 25. 
of gases at high temperatures, 37. 
Exponential law, advantages of, in pyrometry, 
277. 
Fiducial reading of air thermometer, 186. 
Fievez, photometric pyrometry of, 46.. 
Fire clay classified by viscosity measurements, 
46. 
air thermometer, 20,54,237. 
Fischer, pyrometric work of, 23. 
calorimetric pyrometer of, 41. 
criticises Siemens' pyrometer, 51. 
Fletcher combustion furnace, 166. 
Forms of transpiration pyrometer, 303. 
Formula of Avenarius, insufficiency of, 125. 
Formulae, thermo-electric, how used, 103. 
forconstantvolumeair thermometer, 188,190. 
for air thermometer, errors of, 190. 
Formulae for constant pressure air thermometer, 
210. 
simplified, 211. 
Formulae, errors of simplified forms of, 214. 
for experimental errors in constant pressure 
air thermometry, 227. 
for thermal changes of viscosity compared, 
277. 
for transpiration pyrometry, 281. 
for wide transpiration tubes, 285. 
Forster criticizes Siemens's pyrometer, 51. 
Frontispiece described, 187. 
Fuess, metallic air thermometer of, 33. 
Furnace for boiling zinc, 64. 
for small boiling crucible, 92. 
for revolving muffle, 180, 188. 
Fusing points measured by Violle, 39. 
Fusion, phenomena of, 17. 
pyrometers, 39. 
of wires of thermo-couples, effect of, 54. 
of alloys, 128. 
Gaseity, effect of imperfect, 279, 
<Jas expansions, comparison of, 238. 
Gases, expansion of, 27. 
high-temperature expansion of, 37. 
electrical resistance of, 52. 
condense on solids, 301. 
Gasometers, 179. 
Gauntlet, expansion pyrometer of, 26. 
Gibbon, expansion pyrometer of, 26. 
Gibbs's ring-burner, 85, 89, 90. 
Glass re-entrant air thermometer, 237. 
Gleitungs coefficient, 276,302. 
Helmholz on, 251,252. 
Gooch, suggests ring-burner, 85. 
sodium tungstate luting of, 93. 
Gosse, apparatus of, 21,31. 
Govi, radiation pyrometer of, 43. 
on transparency of metals, 164. 
Graham, transpiration work of, 47. 
on gas transpiration, 241, 241. 
Graphite crucible, large form, for zinc, 73. 
Grassi, studies dilitation of gases, 33. 
Gray and Trannin, photometer of, 44. 
Greiner, Emil, apparatus of, 21. 
boiling tubes of, 89. 
Groshans, principle of, 22. 
Grunow, William, apparatus of, 21. 
air-thermometer stand of, 167. 
cathetometer of, 251. 
Guthrie, on efflux through short tubes, 242. 
Guyton-Morveau, calorimetric pyrometer of, 40. 
pyrometric work of, 25, 26, 28. 
II. 
Hagen, transpiration data of. 241. 
Hall & Sons, apparatus of, 21. 
Hallock, Dr. William, appointment of, 18. 
work done by, 19, 20. 
constructs furnace for zinc, 62. 
suggests arch for insulator machine, 96. 
tests displacement thermometer, 165. 
modifies the Jolly-Pfaundler stand, 167. 
air-thermometer measurements of, 200. 
(See Chapter I.) 
Heat conduction, phenomena of, 17. 
pyrometry based on, 42. 
