496 NATURE 
be removed. Surgeon-Captain F. F. MacCabe: Larvi- 
cides in action. The writer of this paper commences 
by pointing out that kerosene oil practically always 
fails to kill larvicides, as they manage to ‘take 
cover’’ from it, and even can breath through it, and 
he makes an exhibit to prove that it kills water- 
snails, which he has discovered are greedy feeders 
on mosquito eggs. He then relates a number of ex- 
periments made with substances likely to act as larvi- 
cides, and tells of successful results obtained by him 
with a paste the basis of which is chloride of lime and 
of other successful results obtained by passing of 
low-tension electric currents through the water. 
BOOKS RECEIVED. 
Liverpool Marine Biology Committee. 
Memoirs on Typical British Marine 
Animals. xx., Buccinum (the Whelk). 
Dakin. Pp. viii+115+8 plates. 
and Norgate.) 4s. 6d. 
Chemisches Experimentierbuch. By O. Hahn. Pp. 
165. (Leipzig: Quelle & Meyer). 1-80 marks. 
Unsere Wasserinsekten. By G. Ulmer. Pp. v+ 
165. (Leipzig: Quelle & Meyer). 1.80 marks. 
Aus der Vorgeschichte der Pflanzenwelt. By Dr. 
W. Gothan. Pp. 184. (Leipzig: Quelle & Meyer.) 
1.80 marks. 
Deutschlands Bodenschiitze. I., Kohlen und Salze. 
L.M.B.C. 
Plants and 
By Dr. W. J. 
(London: Williams 
By L. Milch. Pp. 151. (Leipzig : Quelle & Meyer). 
1.25 marks. 
Himmelskunde. By Prof. U. Marcuse. Bp: i356 
(Leipzig : Quelle & Meyer.) 1.25 marks. 
Handbuch der vergleichenden Physiologie. Edited 
by H. Winterstein. 23 Lief. Band I., 1 Hilfte, Re 
24 Lief. Band III., 2 Halfte, 4. (Jena: G. Fischer.) 
Each 5 marks. 
Union of South Africa. Mines Department. Geo- 
logical Survey Memoir, No. 6—The Geology of the 
Murchison Range and District. By A. L. Hall. Pp. 
186+ plates. (Pretoria: Government Printing and 
Stationery Office.) 7s. 6d. 
A Critical Revision of the Genus Eucalyptus. By 
J. H. Maiden. Vol. ii., pt. 4. Pp. 131-164 + plates 
61-64. (Sydney: W. A. Gullick.) 2s. 6d. 
The Chemical Constitution of the Proteins. By Dr. 
R. H. A. Plimmer. Pt. i., Analysis. Second edition. 
Pp. xii+188. (London: Longmans and Co.) 5s. 6d. 
net. 
Memoirs of the Boston Society of Natural History. 
Vol. vii., Phylogeny of the Echini, with a Revision of 
Paleozoic Species. By R. T. Jackson. Pp. 491+ 
plates 76. (Boston, Mass.: The Society of Natural 
History.) § 
The Dynamics of Mechanical Flight. 
Greenhill. Pp. iii+ 121. 
Co., Ltd.) 8s. 6d. net. 
The Beyond that is Within and other Addresses. 
By Prof. E. Boutroux. Translated by J. Nield. Pp. 
By Sir G. 
(London: Constable and 
Xvi+138. (London: Duckworth and Co.) 35. 6d. 
net. 
Paul Drudes Physik des Aethers auf Elektro- 
magnetischer Grundlage. Zweite Auflage. By Prof. 
W. Konig. Pp. xvi+671. 
The British Bird Book. Edited by F. B. Kirkman. 
Section IX. Pp. 413-609+plates. (London and 
Edinburgh: T. C. and E. C. Jack.) os. 6d. net. 
Journal of the College of Science, Imperial Univer- 
(Stuttgart: F. Enke.) 
sity of Tokyo. Vol. xxxi., Flora Koreana. By T. 
Ase Pp. 573+xx plates. (Tokyo: The Univer- 
sity. 
The Elements of Inorganic Chemistry. By W. A. 
Shenstone. Sixth edition. Edited by R. G. Durrant. 
Pp. xii+567. (London: E. Arnold.) ss. 
NO. 2228, vot. 89] 
[JuLy 11, 1912 
The Application of Science to Industry. Souvenir 
of the Congress of the Universities of the Empire, 
London, 1912. Pp. 112. (London: Burroughs, Well- 
come and Co.) 
Allgemeine Botanik. By Prof. A. Nathansohn. Pp. 
viii+471. (Leipzig : Quelle & Meyer.) 10 marks. 
Cambridge County Geographies: North Lancashire. 
By Dr. J. E. Marr. Pp. xiit+180. (Cambridge Uni- 
versity Press.) 1s. 6d. 
The Testing of Wood Pulp. By Sindall and Bacon. 
Pp. 148. (London: Marchant Singer and Co.) 
The Triuneverse: a Scientific Romance. By the 
Author of ‘“‘Space and Spirit.” Pp. xiv+221. (Lon- 
don: C. Knight and Co., Ltd.) 5s. net. 
An Introduction to Psychology. By Prof. W. 
Wundt. Translated by Dr. R. Pinter. Pp. xi+108. 
(London: Allen and Co., Ltd.) 3s. 6d. 
Memoirs of the Geological Survey. Summary of 
Progress of the Geological Survey of Great Britain 
and the Museum of Practical Geology for 1911. Pp. 
iv+9o. (London: H.M.S.O.; E. Stanford and 
others.) Is. 
Vorschule der Geologie. 
Fiinfte Auflage. Pp. viii+237. (Jena: G. Fischer.) 
2 marks, 
Mémoires sur 1’Electricité et l’Optique. By A. 
Potier. Pp. xx+330. (Paris: Gauthier-Villars.) 13 
francs. 
Bureau des Longitudes. Réception des Signaux 
Radio-télégraphiques transmis par la Tour Eiffel. 
Pp. 56. (Paris: Gauthier-Villars.) 1.75 francs. 
By Prof. J. Walther. 
Sub-Alpine Plants or Flowers of the Swiss Woods 
and Meadows. By H. S. Thompson. Pp. xv+325. 
(London: G. Routledge and Sons, Ltd.) 7s. 6d. net. 
The Early Naturalists : their Lives and Work (1530- 
1789). By Dr. L. C. Miall. Pp. xi+396. (London : 
Macmillan and Co., Ltd.) tos. net. 
CONTENTS. PAGE 
The Physical Constitution of the Earth. By H. L. 471 
Electrical Engineering. By Prof. Gisbert Kapp . 472 
Principia Mathematica. ByG.B.M.. . Vea oma 
Disease-Disseminating Arthropods. By E. E. A. 474 
Siranstormer Design, | -.aaieae ae enn Seon be sti 
OnrBookshelf |... . =egeeeee. 2 eee 476 
Letters to the Editor :— 
Forced Vibrations-—John L, Dunk ....... 477 
Mendel and Niageli—_H. H. O’Farrell. .... . 477 
Congress of Universities of the Empire : Saray 
Geodetic Work in the Ordnance Survey. By 
eG. . « 3) mer ao) 
The Sheffield Meeting of the British Association: 
Provisional Programmes of Sections. . . : = 486 
INGtesiss 5. 5 2 SO 0.) one 482 
Our Astronomical Column :— 
Magnitude Observations at Harvard College Observa- 
tory -.. eee : 2 GSO 
Mhe Astrographic Catalooue Gee. « oe 487 
Position of the Red Spot on Jupiter. . . . . =e AGy 
The Diseases due to Filaria Bancroftt. ..... . 487 
The Eruptions of the Asama-Yama (Japan) in 
1909-11. By Dr.C. Davison. .... Me inh ksh 
The Fresh-water Fauna of Central Europe. By 
eit Acie. <  . oe 488 
Prof. J. R. Ainsworth-Davis . . 489 
Cyolonesis): ... . . "| eee. » ats 489 
The Manufacture of Nitrates from the Atmosphere. 
(Zilustrated.) By Ernest Kilburn Scott. . . ye A003 
University and Educational Intelligence .... . 492 
Nocietres:and Academies = jeneeeeee) «Caen 493 
BookspReceived .. . =. seen =. eee 496 
