m 



INDEX. 



Voltaic combinations, observations on, 89. 



Voltaic electricity, on tbe phenomena and 

 laws of action of, 68 ; on the use of sul- 

 phate of copper for exciting, 145; ex- 

 planation of the principles upon which 

 the chemical theory of, is founded, 274. 



Voltaic pile, theory of the, 285 ; tensile 

 effects of, 288 ; dynamic effects of the, 

 290 ; circumstances which effect the 

 power of the, 291 ; results arrived at, 

 293, 294 ; results obtained by Brt*guet's 

 metallic helix, 298 ; summary of, 299. 



Wartmann (JVI.) on the periodical meteors, 

 261. 



Warwickshire, on the upper formations of 

 the new red system in, 318. 



Waterhouse (G. R.) on certain differences 

 existing between two specimens of Myr- 

 mecobius, 200. 



Watkins ( F.) on thermo-electricity, 304 ; 

 on the thermo-electric spark, 398. 



"Wave-surface, on an alleged demonstration 

 of Fresnel relative to the, 524 ; in the 

 theory of double refraction, 417. 



Wax, composition of various vegetable, 156. 



Wazington (R.) on the action of chromic 

 acid upon silver, 489. 



Well at Beaumoni Green, on a, 215. 



Whewell (Rev. W.) on the diurnal inequa- 

 lity wave on the coasts of Europe, 1 95 ; 

 researches on the tides : eighth series, 

 195 ; on his instrument for registering 

 aerial currents, 474. 



Wiegmann (M.) notice of Ehrenberg's 

 discoveries respecting the Bacillariae,448. 



Williams (Rev. D.) on the raised beaches 

 of Saunton Downend and Baggy Point, 

 117. 



Williamson (W. C.) on the affinity of fossil 

 scales of fish with those of the recent Sal- 

 monidas. 300. 



Winckler on the products by distillation of 

 bitter almonds and the leaves of the com- 

 mon laurel, 160; on the preparation of 

 pure quassin, 336. 



Wind, on the velocity of, 194. 



Winds, outlines of a general theory of the, 

 227, 353 ; notice relative to the theory 

 of the, 390. 



Wires, electro-magnetic, conducting power 

 of, 1 ; on the conducting powers of, 192. 



Worcestershire, on the upper formations of 

 the new red system in, 318. 



Wyatt (J.) on a trap-dyke in the Penrhyn 

 slate quarries, 103. 



Young (J. R.), formula; for the summation 

 of infinite series, 41 ; on Prof. Wallace's 

 property of the parabola, 302. 



Zinc, chloro-sulphuret of, 560. 



Zoological Society, 1 18, 196, 394, 469. 



Zoology : — on the first changes in the ova 

 of the Mammifera, 93 ; hereditary in- 

 stinctive propensities of animals, 96 ; on 

 a species of Glaucus, 118; on hollow- 

 horned Ruminants, 124; Ixalus proba- 

 ton, 124; Antilope Eurycerus, 125 ; 

 Antilope Sumatrensis, 1£6 ; Entozoa in 

 the stomach of the tiger, 1 28 ; structure 

 of the higher forms of Polypi, 189 ; ana- 

 tomy of the spermaceti whale, 1 96 ; Phy- 

 seter macrocephalus, 196 ; a new species 

 of the genus Perameles, 198 ; differences 

 existing between two specimens of Myr- 

 mecobius, 200 ; cranium of the Toxodon 

 platensis, 205 ; on the Gerboas and Jer- 

 billas, 394 ; arrangements of the Ru- 

 minantia, 469; Camelidse, 471; Cer- 

 vidse, 471; Moschidae, 472; Caprida?, 

 473 ; Bovidae, 473 ; Strix castanops, 

 474 ; development of Crustacea, 552. 



END OF THE ELEVENTH VOLUME 



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