840 Index. 



Supplementary observations on closed fire-places . . iii, 489-504. 

 Suspension of heavy bodies of small size on the sur- 

 face of water ii, 290, 303. 



TABLE illuminator iv, 113. 



Tallow, heat developed in combustion of ii, 402. 



quantity consumed in production of light . . . . iv, 37. 



Tea-kettles, construction of iii, 420-426. 



Temperature of water at maximum density . . . . ii, 258-273. 



uniform, at bottom of deep lakes ii, 253. 



The'nard and Gay-Lussac, analysis of wood ii, 465. 



Thermometer, air, most reliable measure of temperature . ii, 157. 

 indicates mean temperature of contiguous 



particles i, 370. 



not a measure of sensible heat of bodies . . i, 434. 



Thermometers, various, description of, i, 247, 334 (plate), 373, 404 



(plate)) 406, 410, 418, 438, 439 ; ii, 24, 193, 199, 



226, 229 ; iv, 736, 738. 



Thermoscope . . . . - ii, 47, 50 (plate), 174. 



Torricellian vacuum, conducting power of, i, 405-424 ; ii, 193 ; 



iii, 50. 



Transmission of heat, mode of ii, 247-249. 



(See also Propagation of heat.} 



Transparency of flame iv, 39. 



Transparent fluids (with reference to heat) defined . . . ii, 99. 

 Trees, quantity of air and sap in, at different seasons . . ii, 445. 



Turpentine, spirits of, capacity for heat of ii, 434. 



gold and silver reduced by . . . . iv, 90. 



UNITED STATES, description of gun presented to . . . . i, 177. 

 Usury at Munich, measures for putting an end to . . . . iv, 503. 



VACUUM,- Torricellian, conducting power of, i, 405-424; ii, 193; 



iii, 50. 

 Vapours, heat developed in condensation of ... ii, 417-424. 



Velocities of bullets, method of computing i, 25. 



determining i, 6, 49. 



relation of, to the charges of powder 



employed i, 40. 



relation of, to their weight .... i, 74. 



