554 
NATURE 
[Jury 15, 1915 

the termites found in the Territory collect the great 
bulk of the earth and sand used in their termitaria, 
upon the surface.—T. Steel: The feeding-tracks of 
Limax maximus, Linn. 
Cape Town. 
Royal Society of South Africa, May 19.—Dr. L. 
Péringuey, president, in the chair.—A. Brown: he 
equivalent mass of a spring vibrating longitudinally. 
The paper deals with the allowance to be made for the 
mass of a spring when a weight attached to it is 
oscillating under gravity and the tension of the spring. 
The fraction. one-third of the spring’s mass is correct 
for great added weights; for very small weights the 
fraction is a little over two-fifths. The variation of 
this fraction is considered theoretically, and data sup- 
plied to give its value for any weight. Experiments 
are described confirming the theoretical results.— 
A. W. Rogers: The occurrence of dinosaur bones in 
Bushmanland. Dinosaur bones were found in a well 
in Bushmanland at 112 ft. below the surface. The 
well is in an old valley cut in gneiss and filled in with 
local débris. It seems probable that the climate be- 
came dry while the dinosaurs lived there, and that 
since then the valley has been steadily filled up.— 
S. H. Haughton: Description of the dinosaur bones 
from Bushmanland. The bones discovered by Dr. 
Rogers consist of a maxillary tooth and portions of 
the hind limbs and caudal vertebra of a medium-sized 
Ornithopodous Dinosaur. They are described under 
the name Kangnasaurus Coetzeci n.g. et sp., which is 
shown to have affinities with Camptcsaurus and its 
allies, and with Mochlodon and Hypsilophodon. The 
form is certainly younger than Camptosaurus, but no 
estimate of its exact age is given—the evidence being 
considered to be insufficient—C. K. Brain: The 
Coccidz of South Africa. The paper, which is the 
first contribution to a catalogue of the Coccide of 
South Africa, deals with five subfamilies, viz. :— 
Pseudococcinz, Orthesiinze, Coccinze, Monophlebinz, 
and Margarodinz. Sixty-three species and two varie- 
ties are described, of which number thirty-two are here 
dealt with for the first time.—J. S. v. d. Lingen: A 
note on the molecules of liquid crystals. The object 
of the paper is to show the effect of bi-prisms on the 
Laue spots. Experiments carried out with prisms of 
NaCl show that the spots are ‘ fluted,” and that the 
central spot is elliptic instead of circular. 60° and 170° 
bi-prisms show this phenomenon, especially when they 
are rotated through a small angle.—J. S. y. d. Lingen: 
The ‘lines’ within R6ntgen interference photo- 
graphs. The author holds that these lines are due to 
the ruptured surface, which will most probably re- 
semble an echelon grating. Sodium chloride, quartz, 
silicon, and magnesium hydroxide photographs are 
described. These show ‘irregular spots’’ under cer- 
tain conditions. 


BOOKS RECEIVED. 
Arithmetic. By C. Godfrey and E. A. Price. Parts 
i., ii., and ili. Complete. With Answers. Pp. xiii+ 
467. (Cambridge: At the University Press.) 4s. 
Typical Flies: a Photographic Atlas of Diptera, in- 
cluding Aphaniptera. By E. K. Pearce. Pp. xii+ 47. 
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Citizens To Be: a Social Study of Health, Wis- 
dom, and Goodness. By M. L. V. Hughes. Pp. 
Xvii+331.- (London: Constable and Co., Ltd.) 4s. 6d. 
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The Natural History of the State: an Introduction 
to Political Science. By Prof. H. J. Ford. Pp. viii+ 
188. (Princeton, U.S.A.: University Press; London : 
Oxford University Press.) 4s. 6d. net. 
Ship Form, Resistance and Screw Propulsion. By 
NO. 2385, VOL. 95 | 


G. S. Baker. Pp. vii+245. (London: Constable and 
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Plain and Reinforced Concrete Arches. 
Melan. Translated by Prof. D. B. Steinman. Pp. 
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don: Chapman and Hall, Ltd.) 8s. 6d. net. 
A History of British Mammals. By G. E. H. Bar- 
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(‘London : Gurney and Jackson.) 2s. 6d. net. 
Introduction to Heat. By A. R. Laws and Dr. 
G. W. Todd. Pp. x+212. (London: Mills and 
Boon.) 2s. 6d. 
Scottish National Antarctic Expedition. Report on 
the Scientific Results of the Voyage of s.y. Scotia 
By Prof. J. 
during the Years 1902, 1903, and 1904, under the 
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Parts iixx. Vertebrates. Pp. xii+505+plates. 
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Elements of Algebra. By G. St. L. Carson. and 
Prof. D. E. Smith. Part 11. Pp. v+325-538. (Lon- 
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CONTENTS. PAGE 
New Books on British Botany .......... 532 
Text-books of Chemistry. ByJ.B.C. ...... 532 
The Physical Basis of Geography. By Dr, Arthur 
Holmes! § 40..°. <7. © 2ph ate en nee 534. 
Qur*Bookshelf . . 0 +.) 20s eee ee nea 534 
Letters to the Editor:— 
The Use of Cotton forthe Production. of Explosives. 
—W. Lawrence Balls; ‘‘ The Writer of the 
Article” nae Breit tol ot ca : : 535 
The Great Aurora of June 16, 1915-—Prof. E. E. 
Barnard ee BMG oe clo obits 
The Magnetic Storm and Solar Disturbance of June 
17, 1915.—Rev. A. L. Cortie, S.J. Spo co eh 
Use of Tyrosine in Promoting Organic Growth.— 
Dr. H. Charlton Bastian, F.R.S...... 537 
Napoleon and the University of Pavia.—Prof. D. 
eraser Farris). (ae eu 538 
Munition Metals. By Prof. H. C. H. Carpenter . ; 538 
The Products of Coal Distillation Hee on eo. Se 
The Manchester Meeting of the British Associa- } 
tions) ByiS..J, Hes Ari O> OST ROPER Cn, 6 542 
Notes os ies RE ort a OMe Momc (a. o 548 
Our Astronomical Column :— 
MiheyStructure of the Universe memeuente uel enane 548 
The Nebulous Region near Omicron Persei » . . . 548 
Work at the Lowell Observatory ......... 548 
Wbhes Museums! Associations.) aac ie eee yaa 
The Daylight Fireball of July5. By W. F. Denning 550 
The Material Basis of Evolution. .... . + « = 550 
University and Educational Intelligence ..... 551 
Societicsiand Academies) =) einen) eee 551 
BooksiReceived .....\. :)\ arenes 5 554 
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