504 
$$$ 
peratures, and when’ cold placed: in’ the vacuum jars. 
and the temperatures carefully recorded in the manner. 
described in the paver. It was found that there was 
an evolution of heat of minute but appreciable quan- 
tity. As regards the bearing of this research’ as 
applied to industrial practice, whilst the rise of tem- 
perature is minute and may not have any direct bear- 
ing upon hardenine results, the curious phenomenon 
noticed throws light upon the series stresses and 
strained condition of the material produced in large 
masses of steel during hardening operations. 
Royal Microscopical Society, January 17.—Mr. E. 
Heron-Allen, president, in the chair.—The report of 
the council for the year was read.—E. Heron-Allen : 
Presidential address: Alcide d’Orbigny, his life and 
his work. ; 
Mathematical Society, February 1.—Prof. H. M. 
Macdonald, president, in the chair.—Major Mac- 
Mahon: (i) The significance of a certain algebraic 
fraction in the theory of distributions. (ii) The num- 
ber of ways of Pairing off the members of two identical 
sets of different quantities. W. H. Salmon: Curves of 
constant torsion. Informal communications were 
made by Lt.-Col. A. Cunningham and Messrs. E. H. 
Neville and L. J. Mordell, 
BOOKS RECEIVED. 
The Correct Arms of Kingston-upon-Hull. 
Sheppard. Pp. Vii+47, (Hull: 
Ltd.) 2s. 6d. net. 
General Chemistry for Colleges. By Prof. A. Smith. 
Second edition: Pp. x+662. (London: G. Bell and 
Sons, Ltd.) 6s. 6d. net. 
By T. 
A. Brown and Sons, 
One Hundred Chemical Problems. By E. A, 
Mason. Pp, 8. (London: G. Bell and Sons, Ltd.) 
6d. net. 
. Hawaiian Legends of Volcanoes (Mythology). Col- 
lected and translated from the Hawaiian by W. D. 
Westervelt. Pp. Xv+205. (Boston, Mass.: Ellis 
Press; London: Constabie and Co., Ltd.) 6s. net. 
Herbert Spencer. (“Makers of the Nineteenth 
Century Series.") By H. E. Elliot. Pp. 330. (Lon- 
don: Constable and Co., Lid.) 6s. net. 
Chemical Bacteriology and Hematology for Prac- 
titioners. By Prof. W. D’Este Emery. Fifth: edition. 
Pp. xiiit+3ro0+plates and figs. (London. H. K. 
Lewis and Co., Ltd.) gs. net, 
The Cambridge History of English Literature. 
Vol. xiv. Pp, xli+ 658. 
sity Press.) os net. 
Life and Habit. By S. Butler. New edition. 
X+310. (London: A, C. Fifield.) 5s. net, 
Memoirs of the Geological Survey, Scotland. The 
Economic Geology of the Central Coalfield of Scotland, 
including Parts of the Counties of Lanark, Stirling, 
Renfrew, Linlithgow, Dumbarton, and Edinburgh, 
Description of Area V, By C. T. Clough and others. 
(Edinburgh : H.M.S.O.: London: E. Stanford, Ltd., 
and others.) 4s. 6d. 
Revision Papers in 
chardt. 
28.5 
(Cambridge: At the Univer- 
Pp. 
Arithmetic. 
Pp. vili+156+xxxii. 
with Answers. 
The Pennatulacea of the Siboga Expedition, with 
a General Survey of the Order. By Prof. S. J. Hick- 
By W. G. Bor- 
(London ; Rivingtons.) 
son. 10 plates, 45 text figs., 1 chart+ pp. x+26s. 
(Leyden: E. J. Brill.) 13.50 francs. 2 
DIARY OF SOCIETIES. 
THURSDAY, FEBRUARY 22, 
Rovat Sociery, at 4-30:—The Fossil Human Skull found \ i 
"s +30.- ‘ an § at Talgai 
Queensland: S. A Smith.—The M vznetic Storm of August 22, es 
Dr. C. Chree.—The Ordinary Convergence of Restricted Fouri ies : 
Prop We Vous: 2 es Fourier Series : 
NO. 2469, vor. 98] 
NATURE 
a 
[FEBRUARY 22, 1917, -@ 
ia 
Royat Institution, at 3.—Memorial Art in History: Prof. E. S. Prior, ” 
Royat Grocrapnicat Society, at 5.—The Origin and Growth of the — 
Dry Lakes in Western Australia : J. T. Jutson. ia 
A 
FRIDAY, Faprvary 23. / ; } 5 
5-3%— Some Guarantees of Liberty : H. Wickham, 
SATURDAY, Veprvary 24. 
Rovac Institurion, at 3.—The Pronunciation of Languages in General 
Daniel Jones. : } ye 
TUESDAY, Feprvary Py 
Rovat_ Ivstrrution, at 3.—Strength and Structure of Metals: Prof,’ 
W. E. Dalby. : ; 
Royat Society or ARTs, at 
Them: Alfred Rigland, M.P. 
Roya ANTHROPOLOGICAL INSTITUTE, at s.—The.Criminal in the Western 
Punjab. (Epidiascope) : Major A. J. O'Brien, ’ 
WEDNESDAY, FEprvary 28. va 
GeoLocicat Society, at 5,3—Fourth Note on the Piltdown Gravel, 
with Evidence of a Second Skull of Eoanthropus dawsoni: Dr. A. Smith 
Woodward. : 5 
Rovat Society or Arts, at 4-30.—The War and Our Supply of Drugs: 
S: 
Rovat Instrrurion, at 
Steed. 
it~ 
ath 
onry - ’ : ‘ 
4-30.—Imperial Assets; and How to Use 
Francis A. Hocking. 
THURSDAY, Marcu r+ 
Roya Institution, at 3-—Memorial Art To-day : Prof. E. S. Prior. 
MATHEMATICAL Society, at 5-30. 
FRIDAY, Marcu 2. F 
at 5.30.—Cellulose and Chemical Industry (1866= 
Roya InstiTUTION, 
1916): C. F. Cross. 
SATURDAY, Marcu 3. 
Rovav Institution, at -3.—The Pronunciation of English at the Time 
of Shakespeare. (Lecture II.) : Daniel Jones. 
CONTENTS. PAGK 
Plant Physiology and Teratology... .... . . 485 
Works on Civil Engineering + 33. a) ee 
The Geology and Supply of Mineral Oil, ByJ. W.G. 487 
Our Bookshelf Fad Wels taitene ¢ 
Letters to the Editor:— 
Impending Developments in Chemical Enterprises, — 
“ Krypton” | F ee + 489 
Science in Public Schools. —Rev. Canon James M. , 
Wilson 2 es et ae :* «3g asa 
The Nature of Growths in Colloidal Silica Solutions, 
—Hon. H. Onslow .. sits Oo - 489 
Stability in Flight.—Rt. Hon. Sir Herbert . ' 
Maxwell, Bart., F.R.S.; Prof. D'Arcy W. 
Thompson, C.B., F.R.S. 490 
Alpine Strain in the Bengali People.—Ramaprasad 
Chanda Pees , af 401 
Shakespeare’s England, (Z/lustrated.) By Sir Her- ! 
bert Warren, K.C.V.O. . -: ce 491. 
The Future of French Metallurgy. By Prof. 
H.C. H.Carpenter . 54 aeons Nea + 493 
The Deyelopment of British Qil-shale Resources. 
By We Goed. 3 ors esse cet pe ss 8 404 
Wotes: 1oio: Cielo. hae eee . : 495 
Our Astronomical Column :— 
The Spectra of Cepheid Variables... . .” Saar tente\ AGS 
Daylight Photography'of Stars ......., > + 499 
Report of the Cape Observatory. ., |, _ + 499 
The Theory of Isostasy as Applied to the Quater- 5 
nary Oscillations of Sea-level. By W. B, Wright 499 
Plant Diseases . = : ; 2.9 AROS 
Coal and itsEconomic Utilisation. By Prof. J.S.S..° 3 
Brame Ee aks => SOs ireerig ‘32 Soot 
University and Educational Intelligence « = sb Og 
Societies and Academies... ....,.._ + 3 §03 
Books Received. ..-... . 0d «on BOR 
Diary of Societies 4 504 
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