552 



I N D E X. 



Toluol, on the formation and compo- 

 sition of, 31. 



Toluylic acid, on the formation and 

 composition of, 15. 



Trez (M. de) on the presence of sele- 

 nium in the iodide of potassium, 

 397. 



Vanishing groups, account of the me- 

 thod of, 114. 



Vapour, on a formula for the elastic 

 force of, 303. 



Vapours, prismatic analysis of the 

 flames of various, 101. 



Vision, on the distinctness of, pro- 

 duced in certain cases by the use 

 of the polarizing microscope, I6l. 



Vitreous humour, on the structure of 

 the, 1. 



Volcanic geology, observations on, 

 216,290. 



Wartmann (Prof. E.) on an easy me- 

 thod of measuring the distance and 

 height of an elevated point, 375 ; 

 on some new lines in the solar 

 spectrum, 499. 



Watts (Henry) on the analysis of 

 hop-ash, 54. 



Weather, remarks on the, 130, 506. 



Whewell (Dr.), researches on tides, 

 139. 



Wohler (M.), on the action of zinc 

 on selenious acid, 544. 



Wright (T.), an account of the specu- 

 lations of, 241. 



Yollond's (Capt. W.) Account of the 

 Measurement of the Lough Foyle 

 Base in Ireland, noticed, 287. 



Young (Prof. J. R.) on the integral 



— , 11; on the combination of 



X 



the theorems of Maclaurin and 

 Taylor, 98. 



Zantedescbi (M.), physico-chemical 

 researches of, 501. 



Zinc, on the crystalline form of me- 

 tallic, 314 ; on the crystallized 

 monohydrate of, 315 ; action of, on 

 selenious acid, 544. 



END OF THE THIRTY-SECOND VOLUME. 



PRINTED BY RICHARD AND JOHN E. TAYLOR, 

 RED LION COURT, FLEET STREET. 



FLAMMAM. 



