24 
of the planets.—H. Bordier: The action of light on 
dilute aqueous solutions of iodine and iodide of starch. 
Dilute solutions of these two substances, stable in the 
dark, are bleached by the action of light. The hypo- 
thesis put forward to explain this fact is based on the 
supposition that both iodine and iodide of starch do not 
form true solutions but colloidal solutions.—A. 
Blanchetiére : The relations between the chemical con- 
stitution of certain derivatives of amino-acids and the 
mode of attack of these substances by bacteria.—Ch. 
Dhéré and G. Vegezzi: The influence exercised by the 
degree of reduction of the hamochromogens on their 
spectra. 
New SourH WaALEs. 
Linnean Society, June 28.--Mr. C. Hedley, vice-presi- 
dent, in the chair.—R. J. Tillyard : Studies in Australian 
Neuroptera. No. iii., The wing-venation of the Chryso- 
pide. The paper shows the method adopted in extract- 
ing the pupa of Chrysopa from its cocoon, and preparing 
the wing-sheaths for photomicrography. The result of a 
study of the pupal wing tracheation demonstrates that 
the Chrysopide are the most highly specialised of all 
Neuroptera. In the hindwing the point usually taken 
as the origin of Rs is shown to be a false origin, the 
true basal portion being fused with M. In both wings 
the veins usually named the media and cubitus are 
shown to be highly complex formations developed from 
consecutive, short portions of the true media, true 
cubitus, and the more proximal branches of the radial 
sector. These latter are termed the Banksian sectors, 
since their part in the above formations is similar to 
that of the branches forming the Banksian line in 
Myrmeleontide. The two composite veins themselves 
are named the pseudomedia (L’) and pseudocubitus 
(Cu’) respectively. No corresponding veins are known 
anywhere else in the class Insecta. The true media 
is shown to be branched in both wings, Banks’s 
‘“‘divisory veinlet’’ in the forewing being formed by 
divergence and distal re-fusion between M, and M,. 
The paper concludes with a phylogenetic discussion in 
which the venation of the Apochrysidz is compared 
with that of the Chrysopidz, and the descent of these 
families from an original Osmylid-like stock, vid 
forms like the Jurassic Mesochrysopa, is indicated.— 
Dr. A. J. Turner: A third contribution to a knowledge 
of the Lepidopterous fauna of Ebor Scrub, N.S.W. 
Four additional visits to the Scrub, in January, 1916, 
resulted in 128 captures, representing forty species, 
twenty-two of which have been previously recorded. 
Six of the remaining eighteen are known to occur 
elsewhere, and twelve are now described as new, as 
well as an interesting geometrid obtained in 1914, but 
overlooked. The number of recognised species amounts 
to sixty-nine, of which only twenty-four are known 
from other localities —M. Aurousseau: Petrological 
notes. No. ii., The relations between some West Aus- 
tralian gneissic and granitic rocks. The observations 
recorded are grouped under two heads—* The Geology 
of the Roelands District, and ‘“‘ The Crystalline Rocks 
of Albany.” ; 
BOOKS RECEIVED. 
Masonry Dam Design. By Dr. C. E. Morrison and 
O. L. Brodie. Second edition. Pp. ix+276. (New 
York: J. Wiley and Sons, Inc.; London: Chapman 
and Hall, Ltd.) 10s. 6d. net. 
Principles of Oil and Gas Production. -By Prof. 
R. H. Johnson: and S. G. Huntley. Pp. xv+#371. 
(New York: J. Wiley and Sons, Inc.; London : Chap- 
man and Hall, Ltd.) 16s. net. 
A Method for the Identification of Pure Organic 
Compounds, etc. By Dr. S. P. Mulliken. Vol. ii. 
NO. 2445, VOL. 98] 
NATURE 
[SEPTEMBER 7, 1916 
Pp. ix+327. (New. York: Ve Wiley and Sons, Inc. ; 
London: Chapman and Hall, Ltd.) 21s. net. 
Through South Westland. By A. M. Moreland. 
Second edition. Pp. xviiit+219. (London : Whitcombe 
and Tombs, Ltd.) : 
Growth in Length: Embryological Essays. By R 
Assheton. Pp. xi+104. (Cambridge: At the Univer- 
sity Press.) 2s. 6d. net. : 
Agricultural Geology. By R. H. Rastall. Pp. ix+ 
331. (Cambridge: At the University Press.) tos. 6d. 
net. 
The Algebraic Theory of Modular Systems. 
F. S. Macaulay. Pp. xiv+112. 
University Press.) 4s. 6d. net. 
Analytical Chemistry. Vol. i., Qualitative Analysis. 
By Prof. F. P. Treadwell. Translated by W. T. Hall. 
Pp. xiii+538. (New York: J. Wiley and Sons, Ine. ; 
London : Chapman and Hall, Ltd.) 12s. 6d. net. 
Love and Cruelty. By W. H. Cock. Pp. v+148. 
(London: R. Scott.) 2s. net. 
Transactions of the Royal Society of Edinburgh. 
Vol. 1., part iii. Session 1914-15. (Edinburgh: R- 
Grant and Son.) 27s. : 
The Source of Life and Thought. By J. C. Scholey. 
By 
(Cambridge: At the 
Pp. vi+26. (London: Kegan Paul and Co.,: Ltd.) 
Is. net. 
CONTENTS. PAGE 
The Peoples and Languages of Sierra Leone. By 
Sir H. H. Johnston, G.C.M.G., K.C.B... . . . sage 
American. Nature-study <2 agesee i. +. se oe 2 
The Kinetic Theory Revived. By G.H.B..... 3 
Mendelism on the Farm .73)5). 0... .. .9« Soe 
Highway Engineering. ByT.H.B........ 4 
Our Bookshelf, <). = = Gi-peee 4 
Letters to- the Editor:— : 
Observations on the Excitation of Helium Spectra.— 
Prof. O. W. Richardson, F.R.S.; Dr. C. B. 
Bazzoni 5 eis c+ uae SEL ca», © + ieee 
The late Prof. James Geikie—Dr. Marion I. 
Newbigin . ; Bee acer 7 5 
A Treatise on Electricity. (J//lustrated.) By H.S.A. 6 
Egyptian Astronomy and the Zodiac. (///ustrated.) 
By Joseph Offord A MEME 6/8 ae : aan 
The Prevention of Collision at Sea. ....... 8 
Prof. T. G. ‘Brodie, F(R. S:)sgggmiee eos ie. ae Pare 29 
Scientific and Industrial Research > > oa 
The British Association at Newcastle :— 4 
Inaugural Address (Abridged) by Sir Arthur Evans, 
D.Litt., LL.D., P.S.A., F.R.S., Extraordinary 
Professor of Prehistoric Archeology, Oxford, ~ 
Correspondant de l'Institut de France, etc., 
Presidentitwi. > .e Seanad ie) ‘ . 2 
Notes Maree ciieaemer) CN ss 6s 0, ol 18 
Our Astronomical Column :— 
Maxima of Mira Ceti, 1915 “ets ss se ee 21 
A Faint Star with Large Proper Motion .. .. . 22 
The Van Vleck Observatory. .....-.-. 22 
The’ System! of Polaris: - J0ewaauane > = * sce 22 
The Amsterdam Colonial Institute ._ . : 22 
Land-slides on the Panama Canal. By Dr. Vaughan 
Cornish... . aa. k,n 
University and Educational Intelligence .. 23 
Societies and Academies seapee s+ 23 
Books Received . See 24 
Editorial and Publishing Offices: 2 
MACMILLAN & CO., Ltp., 
ST. MARTIN’S STREET, LONDON, W.C. 
Advertisements and business letters to be addressed to the 
Publishers. 
Editorial Communications to the Editor. an 
Telegraphic Address: Puusts, LONDON. 
Telephone Number: Gerrarp 8830. 
