486 
Ure, Dr., on some of the leading doc. 
trines of caleric, 214. ‘ 
Urine of the amphibia, on, Ixxv. 
Uterine system, on a malconformation 
of, 210. 
Ww. 
Water, action of iron upon, xxxv—va- 
pour of, elasticity of, 214—specific 
gravity of, 339, 
Watt, Dr., on the formation of the 
rainbow, 131. 
' Wayvellite, composition of, 381. 
Webbe, Capt., survey of the province 
of Keemaon by, 219. 
Wernerian Natural History Society, re- 
view of the memoirs of, 62, 138. 
Index. 
Wilson, James, Esq., on some species of 
the genus Falco, 137. 
Wodanium, 74, 232, 
¥. 
Yellow dye, new,73,. 
Young, Dr. Thomas, on the advantages 
of multiplied observations in the phy- 
sical sciences, and on the density of 
the earth, 218. 
Yu, Chinese stone, 313. : 
Z. # 
Zinc, specific heat of, 167. 
Zumic acid same as the lactic, lv, 
END OF VOL, XIII. 
ae. ikea OX TETOSOD n 
ERRATA FOR VOL. XIIE 
Page 216, line 4 (from bottom), for 556° read 656°. 
3 (from bottom), for 580° read 680°. 
227, line 2, for poles read equator. 
377, line 5 and 10 from bottom, for Corbeth read Carbeth, 
442, line8 from bottom, for2 atom read 1 atom. 
443, line 20, for eight cubic inches of oxygen gas, read eight cubic inches of 
sulphurous acid gas. 
