58 



GENERAL INDEX OF VOLS. 1 — 12. 



Woolhouse (W. S. B.) on the enharmo- 

 nic organ, vii. 366 ; on tlie theory of 

 gradients on railways, viii. 243 ; on the 

 theory of vanishing fractions, viii. 393 ; 

 reply to Prof. Young, ix. 18, 209. 



Worcestershire, on the upper formations 

 of the new red system in, xi. 318. 



Worm, vegetable mould produced by the 

 digestive process of the, xii. 90 ; 

 double-bodied intestinal, x. 253. 



Wrede's (M.von) theory of the absorption 

 of light, on, xii. 114. 



Wright (T.) on Dr. Buckland's theory of 

 the action of the siphuncle in the 

 pearly nautilus, xii. 503. 



Wrottesley (Mr.), catalogue of the right 

 ascensions of 1318 stars, x. 227. 



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

 slate quarries, xi. 103. 



Xon the undulatory theory, vi. 

 • 398. 

 X. Voluntary sounds of insects, x. 327. 

 Xanthoniethilic acid, x. 488. 

 Xanthophylle, the colouring matter of 



leaves in autumn, xii. 135. 

 X. Y. Z., suggestions respecting the en- 

 suing meeting of the British Associa- 

 tion, vii. 118. 



YARRELL (W.) on the Apteryx Au- 

 straUs, iii. 299 ; on a species of pipe- 

 fish, viii. 347; on an insect destructive 

 to turnips, viii. 347 ; on a mode of pre- 

 serving fish peculiarly adapted for tra- 

 vellers over land, Lx. 391. 



Yates (Rev. J.) on a submarine forest in 

 Cardigan Bay, ii. 148, 241. 



York, city of, specification of trades in, 

 i. 218. 



Yorke (Capt. P.), experiments on the ac- 

 tion of water and air on lead, v. 81. 



Yorkshire, on the lower coal series of, i . 

 349 ; on the upper lias and marlstone 

 of, ix. 497. 



Young (J.) on a new voltaic battery, x. 

 241. 



(J. R.) on certain trigonometrical 



functions, v. 198 ; on the summation of 

 slowly converging and diverging infi- 

 nite series, vi. 348 ; vii. 25 ; formula; 

 for the summation of infinite series, 

 x. 121 ; xi. 41 ; on the function Xo, 

 vii. 454 ; on Mr. Woolhousc's theory of 

 vanishing fractions, viii. 295, 515; ix. 

 92; theory and solution of algebraic 

 equations, viii. 402 ; simple method of 

 proving the law of gravitation, ix. 333, 

 370 ; on Prof. Wallace's property of 

 the parabola, xi. 302; " Analytical Ge- 

 ometry," xii. 602. 



ZACH (Baron de) notice of, ii. 144 ; 

 portrait of, ix. 



Zante, geology of, xii. 87. 



Zimb of Bruce, on the, iv. 170. 



Zinc, its protection of other metals from 

 corrosion, vii. 391 ; its separation from 

 nickel, viii. 80 ; composition of carbonate 

 of, viii. 259 ; plates, amalgamation of, 

 viii. 585; chloro-sulphuret of, xi. 560. 



and iron, sulphuret of, vii. 79. 



Zinken (Von), on a new locality of arse- 

 nical copper in Chili, xii. 217. 



Zoological Society, proceedings of, i. 392, 

 460 ; ii. 68, 230, 476 ; iii. 60, 148, 293, 

 372 ; iv. 54, 297, 377, 454 ; v. 72, 

 143, 230, 311, 379; vi. 68, 150, 223, 

 307, 380, 452 ; vii. 64, 152, 222, 328, 

 417, 519; viii. 161, 346;ix. 66, 136, 224, 

 298, 388, 503; x. 287, 479; xi. 118, 

 196, 394,469; xii. 211, 441, 526, 592. 



Zoology, fossil, on, ii. 473. 



Zurlite and Wollastonite, vi. 76. 



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