INDEX. 



Soil, a peculm, analysed, containing 

 free muriatic acid and muriates of 

 «oda, lime, aUnnine, magnesia, and 

 manganese, 1$0 

 Spallanzani's experiments on luminous 

 animals, 46— Observations on them, 

 51 

 Spar, Fluor, or fluate of lime, no ac- 

 curate analysis of yet published, 

 137— «Experiments on, 158— Jiesults 

 159 

 Stone in the bladder, new species of, 

 222— Analytical examination of, 223 

 Strata in the mountains of Norway and 

 Sweden, observations on, confirming 

 the theory of M. Von Humboldt, 58.4 

 Sugar of grapes, how far improved in 



France, 080 

 Sulphur and phosphorusj different re- 

 salts of experiments on, 31 

 T. 

 Tadpole state of reptiles, 552 

 ^Thenard, M. on the oxides of iron 

 and the methods of producing them, 

 186— Remarks on his theory of the 

 Kietallization of the alkalis, 245 

 Thermometer, spirit, diminution of di- 



latabUity of, 73 

 Thomson, Dr. Thomas, his analysis of 

 two new metals from Greenland, one 

 containing a new metallic oxide , the 

 other soda and muria.tic acid, 78— 

 His analysis of fiuor spar, 157 

 Tin mines in France, discovered, 381 

 Tobacco, a substitute for, used by the 



Norwegians, iiSl 

 Tortoues, their organs of respiration^ 

 S53 



Trees, what parts of them firet impaired 

 by age, 275*— Analogy between ve- 

 getable and animal organs, 276— 

 Decay of trees not occasioned by a 

 deficiency of the roots, 277— -Circu- 

 lation of the sap through the leaves, 

 278 — Down on leaves a symptom of 

 decline, 279— See Flowers, and Plants 

 V. 



Vauqnclin, M. 384 



Volition in plants ; query if they ha*» 

 such power, 112 



Volta, Sig. his removal of the difficul- 

 ties attending the doctrine of positive 

 and negative quantities in electri- 

 city, 3 



U. 



Urine, how affected by the alkalis, 12$ 



w. 



Water, questions on the nature of, 



153 — Observations in reply, 154 

 Waterspout observed at Ramsgate, 78 

 Wernerian society of natural history,r 



proceedings at, 317, 379 

 Werner*s " Theory of the Formation of 



Veins," >vith its application to the art 



of working mines, a translation of, 



recently published, 79 

 Wollaston, Dr, W. H. on cystic oxide, 



a new species of utinary calculus, 222 

 Wind instruments, improvement ia th« 



tone of, 382 



Z. 

 Zinc and copper, Vauquelin's mode of 



separating ineffectual, 384 

 Zoophytes, genera of, which affor<4 



light, 41 



END OP THE TWENTY-EIGHTH VOLUME. 



ERRATA. 

 Page Line 

 117 18 Jor my read any 

 178 13 /or of reac/ off 

 256 24 Jttr smaller phmts read semlshrubs 

 258 19 Jor colour read contour. 

 317 At Art. XI there should have been a teference to Phil. 



Trans, for 1810, p. 204. _ 

 330 in the second side note for on read an 



btralfoid, Priuter, C'rowa Couii, ItUipie iiar. 



