AA CONTENTS. 
GENERAL APPENDIX. 
The radiation of the sun, by C. G. Abbot........ 
Modern theories of the sun, by Jean Boslerss:sos:.........---------- De eee Be 
The form and constitution of the earth, by Louis B. Stewart............-.-.-- 
Some remarks on logarithms apropos to their tercentenary, by M. d’Ocagne. . . 
mhe consithimon ole atom; by Ash -Hive-ctessioe see sc soso oss o Sel 5rt tee. 
Gyrostats and gyrostatic action, by Andrew Gray....-..........-..-5---------- 
Siabuityeor aeroplanes; by Orville Wright: 58ers etl 
The first man-carrying aeroplane capable of sustained free flight, by A. F. Zahm. 
Some aspects of industrial chemistry, by L. H. Baekeland......-....-.. SE 
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Climates of geologic time, by Charles Schuchert........................------ 
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The geology of the bottom of the seas, by L. de Launay .. 
Recent oceanographic researches, by Ch. Gravier...........--..-.---------- 
The Klondike and Yukon goldfield in 1913, by H. M. Cadell.............---- 
The history of the discovery of sexuality in plants, by Duncan S. Johnson... -. 
Problems and progress in plant pathology, by L. R. Jones.....-...-.....---- 
Plant-autographs and their revelations, by J. C. Bose..............-----.---- 
The National Zoological Park and its inhabitants, by Frank Baker.........-.. 
The habits and behavior of the herring gull, by R. M. Strong........-.-.-.-- 
Notes on some effects of extreme drought in Waterberg, South Africa, by Eugéne 
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Homeeotic regeneration of the antenne in a Phasmid or walking-stick, by H. O. 
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Latent life: its nature and relations to certain theories of contemporary biology, 
nye Apu py CCCUICK cere cnet cepa yee ite cialis Oe gas BS oo orate we 
The early inhabitants of western Asia, by Felix v. Luschan ....-..-...-..-..--.- 
iE xeavyationsiat Abydos, by, Edouard: Nayilles sc. ooo ee ee oc pes wp np - 
An examination of Chinese bronzes, by John C. Ferguson. - ss 
The réle of depopulation, of deforestation, and of manera gt in ine deandienaa of 
Certain nations. ny, Helix Kegmatltsc. tar. ascieciiclsers cere ccc anseick so saya 
hestory ‘ot the chin, by: Louis Rovimsonse <i wesc riety <p <5!) -gaie == 3 ESS 
Recent Agualeaneains! in the art of illumination, by Preston 8. Millar ROT EE NET 
The loom and spindle: past, present, and future, by Luther Hooper.......-.. 
The demonstration play school of 1918, by Clark W. Hetherington...........- 
Sketch of the life of Eduard Suess (1831-1914), by Pierre Termier........... 
