432 



NA TURE 



\^March \, i8«6 



in .hich L, M, and N denote ;-ff°- f.^^e^'gfee! by" m' 

 homogeneous algebva^ceie-a^^^^^^^^^^^^^ 



?-/°"hv M Gros-lnaysis of some specimens of the atr 

 ^^^'"',, ?a^e'Horn by tSe Mission sent to observe the trans, 

 taken at cape riorii uj/iui. i,,Kln The mean vesult 





, .„^ ,■ .^„.,^n^rrlnf and 1. Lafont.— On th 

 turpentme, by 



Srmatio of monatomic alcohols derived from tne e 

 nvnentine. by MM. G. Botjchardat and . Lafont^ 

 c chlorides on ammonia at a lo\v 

 ,vUc amines, by MM. Camille Vr 



Chappuis.-Note on lesions of the alcoholic nevnte, 



■sSt^:ti^s:;'t;=Sr,;Jv=);:», 



by M. 



_.byM. K. Koehler. 



insects', by M. Ad. Saba- 



The exoeriment, however, showed that with the change in the 



Further fnveltf.aed alter o^ther dielectrics, besides the four men- 

 doned Sid been tested. The most important result of h 

 ^^ents weve^/^nilated^ th^^peaUer as^ J^ows^.) 

 Thp resistance ot tne aieieciuc^ vaii>-va 

 ine rebisiau difterent way from metals. (2) 



?;:^^';-,^ir 'f^e d..^.s w - .e^ ^ 



The resistance depended on the ^"^ ;° c",,,,i,e.Beree further 

 published last and this.year. ^ 



BOOKS AND PAMPHLETS RECEIVED 



_ ,.-.-__.i,._\" . A P. Mever (Hofrm.inn, Dre^ 



then)" ; A. B. Meyer (Hofrm.inn, 



iden). 



Gonfbault.-On the Bahmoshs^us myycsi^ 



Berlin 

 'Zll "^If ifr;r:stme?:i"t Ufe%l^ta"»the dielectrics 



^^J^;:^^hicur.ss<;f^th^.ay^-^t:'^^^ 



-^irS="rS^i.Jv| ma^^^ 



determinations, equal to 25X10 onm ^'^ , 



of which amounted to about lOO olim. 



ObergaiUhal (Ki 

 den)"" DasGriiberfeldvon Ha 



-'■The Chemistry of the Coal-Tar Colours -j,"j.-,;-7p,eytag).-"Phon, 



Knight. ,(Bel.^and_Sons>-;;Der Schall^^ . gr^El-^C^ V (I.PXTC.).- 



StrJ. Lubbock (Macmillan ^.nd Co.).- 



pA^sc-. Icnr present, leur ^i^'^""" - d. oe 



Sch.iU 

 RelTefMap of Scotland ": H. F. Brion 

 " Flowers, Fruits, and Leaves 

 " Les Aerostats Dirigeables ;^ 

 Grilleau (Dentu, Paris). — '^ ••'•- 

 thofen flJppenhei 

 Prof. K. W. v 

 Mosses " : J 



.S. Cockburn (S( 



Berlin).- 

 Dallatorr ; 

 .gnall (S. 



... ^ inschein 



H. D. McLejd(L. 



,d Lo 



mans). — " ^ta 



, F. von Rich- 

 o'the Flora of the Alps" : 

 ,1 Co). — ■' Hand-book of 

 — " Tlie Laws of Nature " : 

 ments of Economics," vol. 

 ual of Music " : R- Dunstan 



ii. part I : H. D. McLeodtLongmans,.-- ^.-_.-»^ j ^ ^33 ., j^^r- 



(HSghes).-" M='<=r'°?Pt';netfn of'he U.I "Ceorogical Survey," Nos. 7 to 

 2=^"?, v.. (Hamburg).- Bid ennon^^ Comptroller of the £urrencv 



■ ■ Lieut. P. H. Kay (Washu 

 of Sessile-Eyed Crustacea" : A, 



that in dielectrics the "i^fV^t the speaker had found that a 

 the thickness,_and in point of f^ct he speaker n ^^.^^ ^^^ 



g7tta-percha layer of 1/13 mm. thickness, and 

 T75 square cm. inse'*'='^ b. 



superfic 



rted" between two metal plates into 



•ID -I— .- f nnniell's element connected to earth, pio- 



(Washington). 

 U S , Decembi 



Polar E.tpedition to Pomt "arrow, 

 ton) _■' On the Structure of the B 

 - ckard (Washington) 



CONTENTS Page 



The Zoological Results ot the " Challenger' Expe- ^^^ 



dition ■. 4.1 1 



The German Naval Observatory^ .. ■ .'^ ' -^ 

 Variation in Domesticated Animals. I-'Y W. ts. ^^^ 



Tegetmeier 



Our Book Shelf:— 1 rnlmlns with 



Greenhill's "Differential and Integral Calculus, witn 

 Applications."-Major Allan Cunningham, R.E. 412 



Smith's " Elementary Algebra '* ^ 



Letters to the Editor : — ,-, ,. p 



The Pleomorphism of the Schizophyta.-Pr3> E. 

 Ray Lankester, F.R.S ■ • • • ■ 



Notes^n the Volcanic Phe"°"f,"%f f.^" '^' ^^"^^ 4 , , 

 „„t,ar —Rev. R. Baron. (Hi/hA/ap) . ■■■ 4is 

 CoTbDust fnd Explosions.-Sir Fredk. A. Abel, 



;;7ured, and -which in the case of g"tta-percha_ amounted on 

 1 average to al 

 varied between 20 ana ^^V_-^'^--J ^y,, two other sub- 



;nrv;r;gVto about 200 ohm. In the case of sulphur the values 



20 and 2000 ohm, and just as varied and 



De'p^sits of the Nile Delta.-Principal Sir J. Wm. 



■£. CDC ^ 



which the whole «^,""""7;;"7;fs„iphur it increased, 



the resistance changed. In the case 01 ^u'F ,.„dstince abated ; 



„ol,.ic pol.,i..»o„ which ™«'l ""f-f„° ;XrW o' •'» 



"nsertion of a changeable resistance into the circuit of the curicnt. 



II. By Prof. H. A, 



418 

 41S 

 418 

 418 



41S 

 421 



On°th:in:iurgencf of-r;ogs.-Miss Mary Knott . 

 Frost in Devonshire.-Henry Cecil . ■ ■ 



Disc;v^:f;ofa^^r^-Ke;;^"hy"ci^'?sWinkler 



The Story of Biela's Comet, 



Newton, {llliislrnfeti) • 



The Navigable Balloon, (llliistnikd) • • ^^■ 



Notes 



Our Astronomical Column :— 



The Binary Star 7 Coronx Australis ^o 



The Nebula round Maia / t>' j- ' .^t 



Prof. Langley on the Emission-Spectra of Bodies at ^^^ 



Low Temperatures ^^6 



Fabry's Comet ' ' ' ^^6 



Barnard's Comet ■ • • • ■ ■^^' \^ ' igge 



Astronomical Phenomena for the WeeK ^^^ 



Th""eTuVan'd Stars, 'lI. ' By J.' Norman Lockyer, 



^if::y' liy Pro. Osbori^e Reynolds; F.R.S." ! 



Societies and Academies . ■ 



Books and Pamphlets Received 



426 

 429 

 429 

 430 

 43^ 



