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Show 486 YAl\1. INDEX. ZOPF-T.Al'BE. YAllf, development of axillary bulbs in the, ii. 169. 1 . YARRELL Mr. deficiency of tectl m huu·lcs~ dog~, i. 34, ii. 326; on duck~, i. 279, ii. 2G2; characters. of clomestl? goose resembling tllOSC of A?,ser alb~frons,' i. ~8~; w~itcncss of ~andcrs, 1: 288; vanat10ns m goldfi sh, 1. 296-297, assumption of mnle plumage by the hen-pheasant, ii. 51_; effect of _cast_r~ tion upon tho cock, u. 51-~2; ~~cod.mb of the skylark -in cn,pt~vity, I_I. 154; plumage of the malo Jmnct . m co~~finemcnt, ii. 158 ; on the dmgo, Il. 263. 00 276 YELLOW fever, in Mexico, n. . YEw, fastigate, ii. 241. .. YEw, Irish, hardy in ow York, n_. 309. YEw, weeping, i. 361; propagatwn of, by seed, ii. 18-19 .. YoLK, variations of, m tho eggs of ducks, i. 281. 0 16 17 YouA'I'T, Mr., l1istory of tho ~log, l. - ;_ variations of tho pulse m J:lroeds ?( (loo-s, i. 35 ; 1 iabil i.ty ~o dr_scaso m clo~s i. 35, ii. 221 ; rnhentn,nco of O"ofir~ in dogs, ii. 10; 0~1 tho grey: hound, i. 34, 41; on Kmg . Charles spaniels, i. 41 ; on tho sott~r,_J. 4_1; on breeds of horses, i. 49; vanatr_on m t!lo number of ribs in tbe horse, 1. 50; 1~:heritanco of diseases in the horse, 11. 10 11 · introduction of Eastern blood into English h orses, ii. ~~ 2-:n3; . ou white Welsh cattle, i. 85, 11 · 2~9; Improvement of British breeds _of cattle, i. 93; rudiments of homs m young hornlcs · cattle, ii. 55, 315; on crol:lsod cattle, ii. 104, 119 ; on llakewell'~ longh orned cattle, ii. 118; sclcctJOn of qunlities in cl1ttle, ii. 196 ; .. d?~~nemtion of cl1ttlo by neglect, 11. 2~.) ; ~n tho skull in hornles::; Cl1ttlo, 1~: ~3.3 ; tli::;oase of white parts of cattle, u. 337; d' lacemont of long-homed by shorth:; ed cattle, ii. 426 ; on Angol?' sheep, i. 95 ;_ on t~e fleece of sh~op, .1. !)g . corr latwn ot horns a11d fleece 10 sh~op, i. 95; adapt.:1Lion of brc~d ( of shc·op to climate . ::md pastu~·c, ~-. !J6 ; horns of Wa llacln an ·l~ccp, J. HG' o~otic sheep in the Zoological qnrdons, _1. 90-97, ii. 305; o~cmT nc~ ~1 ~oms m :hornless breeds o[ sheep, 11. ·?O ' on tho cololll' of sheep, ii. 30 ; on. mtorbree~in g sh eep, ii. 120 ; on Menno 1'<1111 ~ m Germany, ii. I9G; off?ct of unconsCl?US selection on sheep, iJ. 213 ; rcvorHi o.n of Leicester sheep on tho Ln,mmcnnuu Hills, ii. 221; on ma~y-horn?d sheep, ii. 320 ; roductwn of ~OliO m sheep, ii. 242; pe rsistency _of elwract~r m breeds of animals :n moun~;nno:r.s countries, ii. 64; on. mtorb_rood~~g, c n. 116; on the power of sol~ctwn, 1L 194- 195 ; slowness of prorluetio~t of bro~ds, ii. 24'1 : pas~n,ges in ~he B1~lo, rolatt~g to the breodmg of l1ll.JJnuls, ll: 2~1-20:-. YouNG, J. , on tho llolgutn rnb~1t, J.. 10_0. Ym-E, Capt., on l1 Burmese ]Jauy famtly, ii. 77, 327. ZAMBESI, striped young pigs 011 tho, i. 77. ZA~WOI:l, chanwtor of tho, ii. ~7. . . ZANO, J. G., introduction of rubbtts mto Porto anto by, i. 112. Zea lllays, i. 320. . . . ZEnu, i. 79; domostwat1on of tho, 1. 82; fertile crossing of, with Buropoan cattle, i. 83, ii. 110. ZEnBA, hybrill::; of, wiU1 tho as. and marc, ii. 42. Zephyranthe~ ca1.~dida~ i~: 164. Zinnia, cult1vatwn of, 11. 261.. . ZOl.LINOEl~ on Mnlrtytm pongmu ducks. 1. Zo~~~~nE, division of, in Algro, ii. 378. " ZoPF-TAlJBE," i. 154. 'l'llE END. W:\00:\: l'IU!\TED 1lY W. CLOWES AND SONS, DUKE Sl'llllET, S'fAMFOIW S'l'RE J::T, .AND CUARING CROSI:lo ALBEMARLE STREET, February, 1868. WORKS ON SCIENCE, &d. A MANUAL OF SCIENTIFIC INQUIRY. Edited by Sir J. F. HERSCHEL and Rev. RoBERT MAIN. 31·d Edition. Maps. Post 8vo. 9s. THE MARTYRS OF SCIENCE; or, LIVES OF GALILEO, TYCHO BRAHE, and KELPER. By Sir D.\VID BREWSTER. Fcap. 8vo. 4s. 6d. MORE WORLDS THAN ONE : THE CREED OF THE PHILOSOPHER, AND TTIE HOPE OF THE CHRISTIAN. By Sir DAVIO BREWSTER. Post 8vo. 6s. ELEMENTS OF GEOLOGY; or, The Ancient Changes of the Earth nnd its Jnhabiumts. as illustrated by Geological Monuments. 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