414 INDEX. 



Voltaic combinations, on, with reference to the mutual relations of the generating and conducting 

 surfaces, 41. 



W. 



Wheatstone (Charles, Esq.). Contributions to the physiology of vision. Part the first. On 

 some remarkable, and hitherto unobserved, phenomena of binocular vision, 371. 



Whewell (Rev. W.). Researches on the tides. Ninth series. On the determination of the laws 

 of the tides from short series of observations, 231. 



Y. 



Yelk, the proper membrane of the, in Mammals, 315. 



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