S52 



INDEX, 



u. 



Urine of different Animals, analyses of, 

 1. 



Wafeli,' 22*. 



Warming apartments, improvement in, 



109. 



Water combined in muriatic acid gas, 

 (38, IgaJ 



Water contained in woods considered 

 as dry, or seer-woods, 3R3. 



Watt's copying machine, 114. 



Webster, Mr. G., his description of a 

 Cheap and easy method of conveying 

 steam and vapour up a chimney, M8. 



, y on the geology of the Isle 



of Wight, 306. 309. 



Wedsewood's art of copying by trac- 

 ing-paper, 115. 



Wight, Isle of, geological observations 



on, 306. 

 Wilson, Mr. W., on the explosive com- 

 pound of chlorine and azote, 180. 



Winnowing, improvement in, 109. 



W. N. on the hardening of steel, S3.— 

 On multiplying copies of writing, 

 }1J. On the scintillation of the 



stars, 116. On large achromatic 

 lenses, 117. On some passages on 

 t)r. Thompson's preface, 151. On 

 Mr. Button's experiments concern- 

 ing the freezing of alcohol, 172. On 

 a remarkable appearance in the ice 

 of a pond in which a man was drown* 

 cd, 301 ; and on a similar pheno- 

 menon on the bog-lakes of Ireland, 

 311. 



Wood, inquiries relative to the struc- 

 ture of, the specific gravity of its 

 solid parts, and the quantity of li- 

 quids and elastic fluids contained in 

 it, under various circumstances ; the 

 quantity of charcoal to be obtained 

 from it ; and the quantity of heat 

 produced by its combustion, 319. 



Woodhouse, Mr., his perpendicular lift, 

 erected as a substitute for locks on 

 canals, 335. 



Wool, British Merino, when best for 

 the market, 121. 



Wollaston, Dr., 121. On a periscopic 

 camera obscura and microscope, 26. 

 Observations on, 100. 



z. 



Zambeccari, M., his death, 74. 



ERRATUM. 

 Page 152, line 30, for " repertory," read * retrospect.* 1 



END OF THE THIRTY-FOURTH VOLUME. 



Printed b> G. SIDNEY, 



orthqnibcrland-slreet, Strand. 



