90« 



NA TURE 



[December 22, 192; 



>y means of s<»'' 



ire nt the oil 



t c, the t'li 

 ■ rhu'f is 

 md suits 



thusr f., 



•'•ntia! 



tain iisnccts of 



surface ait 

 passing, th' 

 mvcstigatii ' 



' : .111.1:1.. 



■ •• \'-\\ \\ 

 up 



1). i 



II ven' Hittii I 

 The lira tsnl ! 



< i| \ Hill 111-, 



(juarl/.j in mjn 



till 



\ ilrcitus or aiiH'i I'll 

 ill whirh the partii i 



l\.r 



.1 1 



K. ( . 



I intirinatiim 

 (ill kili):;ra!n 

 iKi'f >a!i(l 



ii\ 



iiilly (il)laiiuil 

 1 1 tiir Beilby effect. 

 ahnics per gram mol) 

 (silica as crNsiallinc 

 drolluoric acid were found to be 



.^7-24 and 30-29 resp< nu (or 



fifteen hours the corresp <;5 and 



,2-46 respectively. If wc a»>urne Umt the interna! 

 ' nergy of the amnrnhnu!? phase produced by prindinir 

 is the same as is silica (silica gla^^ 



\v<- (iin <alculai . Its that alxjut 31 per 



he crystal .1 has been converted by 



■ It,. •• ..„,. ..iw .. yu.. .J..^.ities of 



08 and 

 nnuing the 

 ^S. On the 

 'ii|)iion as Dciorc, it loiiuwb iiuii alx)ut 26 per 

 ' quartz has been converted into the vitreous 

 f ,i . .,,e l)etwcen the figures 31 and 

 • approximate rliaracter of the 

 a.ij.uiupiit»ii liiuli rl and to experi- 



mental errors. Jin ioubt, however, 



about the soundness di iIh main conclusion — namely, 

 that the merhanifal action of shearing stress on 

 < r\stal!iiic iiiatt(r i^ to produce a random molecular 

 or atomic distribution in the surf.T'- '•"•'-, 



Obit 



Mr. J. M. Wii.KiK . 



MR. JOHN MATTHEW W ILKIE died on 

 November 29 after an operation. II* was 

 born at Montrose in 1876, and was educated as a 

 pharniairiiti.il chemist; after passing his minor in 

 Edinburgh lie went to Derby and later to London. 

 In 1900 he was appointed as an assistant analyst, 

 and eventually deputy chief analyst, in the laboratory 

 of Boots Pure Drug Co., where he remained until his 

 death. 



Perhaps the best known of Mr. Wilkie's researches 

 wcnthe estimation of small quantities of lead, published 

 u iili Mr. Harvey, the silver methods for the determina- 

 tion of phosphoric acid, and the alkaline iodine oxida- 

 tion of phenols, the last two researches being published 

 in the journal of the Society of Chemical Industry. He 

 also devised a most ingenious method for the estimation 

 of sulphur and oxidised sulphur compounds, which 

 depended on the formation of acid by the bromine 

 oxidation, but this research has only been published in 

 abstract, as he was never quite satisfied that he brought 

 it to a satisfactory completion. These sulphiir oxida- 

 tion methods have, however, been in use at Messrs. 

 Boots' laboratory for some years with most satisfactory 

 results. The last four years of his life was devoted to 

 an almost monumental research on the determination 

 of minimal quantities of arsenic. Step by step he 

 patiently investigated the points of the method, and at 

 the time of his death his work was concluded, and he 

 was engaged in putting his notes into order for publica- 

 tion. This research was given to the world in abstract 

 at the joint meeting of the Society of Public Analysts 

 with the Nottinuliain Section of the Society of Chemical 

 Industry at Nottingham on January 17 last. 



As secretary to the Nottingham Section of the latter 

 society from 1914 to the present year, he was largelv 

 responsible for the success of that Section and the great 

 increase in the membership. He had just become 

 chairman of the Section, and, although he had onlv 

 presided at one meeting, he signalised that bv in- 

 augurating a discussion in which a large number of 



NO. 2825, VOL. 112] 



u a ry. 



young members were persuaded to take pa: ' is 

 always Wilkie's policy to encourage and br: d 



young talent, so much so that at Mrs. Wilkic s special 

 request he was borne to his last resting-place by the 

 young men that he used to encourage and talk about 

 so often. 



ronfain-, nn 



A 



The issue of Science of November ^ 

 appreciative account, by " H. H. W.. 

 work of Prof. Robert Wiedersheim. tK< . . ; _ ' 



professor of anatomy in the Uni\ crsit\ ol I nihi; 

 died on July 12. Wiedersheim was horn on Apni 21. 

 1848, at Niirtingen-am-Neckar. and went in su< i cssjon 

 to the Universities of Tiihingcn and Wiirzburg. At 

 Wiirtzburg he obtained his M.D. and became assistant 

 professor under KoUicker (1872-76). In 1876 he went 

 to Freiburg as assistant to Prof. Alexander Ecker. whom 

 he succeeded as professor of anatomy in 1887. This 

 post he held until he retired from active work in 1918. 

 Wiedersheim 's work lay in the fields of human and com- 

 parative anatomy. Tn 1883 he published his " IaIit- 

 buch der vergleichendcn Anatmnie dcr Wirhclticrc.'' 

 following up this work with the " Grundriss der 

 vergleichendcn Anatoniie." covering; the same ground 

 in a more concise manner. The last edition of the 

 latter, the se\enth. ajjpeared in 1Q09. A modified 

 translation of the " Grundri-- " • f. W. N. Parker, 

 was published in 1886 by M> rnillan and Co.. 



Ltd. He also published a number ol monographs, amoni: 

 which " Das Kopfskelet dcr Urodclen." that on the ear 

 of the Ascalaboten, the . 'amandriua per- 



spicillata and Geotriton J i kni»'>\n With 



his death an outstandimr fic::ure in the hi.--" 

 comparative anatomy of vertebrates has pa.-,.-vv. 



We regret to armounce the following deaths : 

 Mr. George Wharton James, of Pasadena, Cali- 

 fornia, known for his work on American Indian 

 ethnology', on November 8. aged sixty-five. 



Prof. H. Freoman Stecker, professor of mathe- 

 matics in the I'ennsyhania State College, a worker in 

 non-Euclidean geometry-, on October 30, aged fifty-six. 



