SCIENCE—ADVERTISEMENTS 
Publications of 
Carnegie Institution of Washington 
The publications of the Institution now number over 350 
volumes, the subjects including Anatomy, Archeology, As- 
tronomy, Botany, Chemistry, Economics and Sociology, Em- 
bryology, Experimental Evolution and Heredity, Engineering, 
Folk-Lore, Geology, History, International Law, Literature, 
Mathematics, Medicine, Nutrition, Philology, Physics, Zoology. 
Classified and descriptive lists will be sent postpaid on appli- 
cation. 
260. Davis, P. B., and Corzazorarors. Studies on Solu- 
tion in its Relation to Light-Absorption, Conductivity, 
Viscosity, and Hydrolysis: A Report upon a number of 
Experimental Investigations carried out in the Labora- 
tory of the late Professor Harry C. Jones. Octavo, 
144 pp., 26 figs. 
261. Buenepict, F. G., and T. M. Carpenter. Food Inges- 
tion and Energy Transformations with Special Reference 
to the Stimulating Effect of Nutrients. Octavo, 355 
p-, 3 figs., $3.50. i 
264. Srurrevant, A.H. An Analysis of the Effects of Selec- 
tion. Octavo, 68 pp., 1 pl., 14 figs., $1.00. y 
266. Mires, }W. R. Effect of Alcohol on Psycho-Physio- 
logical Functions. Octavo, 144 pp., 15 figs., $1.50. 
267. Swmors, E. F., and W. K. VAN Hascren. Atomic Weights 
of Boron and Fluorine. Octavo, iii+65 pp., $1.00. 
269. Jonnson, D.S. The fruit of Opuntia fulgida. Octavo, 
62 pp., 12 pls. $1.25. 
271. Vol. 
Contributions to Embryology, Nos. 24, 25, 26. 
_ VIL. Quarto, 198 pp. $5.50. 
This book contains the following papers, not sold separately: 
STREETER, |G. The Developmental Alterations in 
the Vascular System of the Brain of the Human Em- 
bryo. (Contribution No. 24.) 38 bP: 5 pls. 12 figs. 
Cownry, E. VY. The Mitochondrial Constituents of Pro- 
toplasm. (Contribution No. 25.) 120 pp., 1 pl.. 9 figs. 
Kunitomo, Kanar, The Development and Reduction 
of the Tail and the Caudal End of the Spinal Cord, 
(Contribution No. 26.) 38 pages, 4 plates, 2 text figs’ 
Orders for above pupiesans may be made through book- 
sellers or sent directly to the Institution. 
All communications should be addressed to 
CARNEGIE INSTITUTION OF WASHINGTON 
WASHINGTON, D.C. 
A DICTIONARY FOR 
EVERY LIBRARY 
-GOULD’S 
MEDICAL 
DICTIONARY 
(THE PRACTITIONER’S) 
Flexible Cloth, Marbled Edges 
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71,000 Words 
Pronunciation=--Definition=-Deriyation 
Includes many of the words of allied 
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SOME TESTS OF DOUGLAS FIR 
AFTER LONG USE 
By Arthur C. Alvarez............csseecceseeeneeees 70 
The Strength of Long-Seasoned} Douglas]|Fir and Red- 
wood, by Arthur C. Alvarez............ssessseseceeseeteeneeeneees -10 
Som ¢Compression Tests of Portland Cement Mortars and 
Concrete Containing Various jPercentage of !Silt, by 
Arthur C. Alvarez and James'R. Shields 25 
The Wintun Hesi Ceremony, by S. A. Barrett............... -50 
New Pacific Coast Marine Algae III, by Nathaniel Lyon 
Gardnientveresstrescnsstier con cnseneeancatestataamecessacaedtatesceniecan 35 
New Pacific Coast Marine Algae IV, by Nathaniel Lyon 
Gardner... 10 
The above titles represent University of California Publications 
in Engineering, Anthropology and Botany. Other series 
published by the University of California include Agricultural 
Sciences, Entomology, Geography, \Geology, Pathology, 
Physiology Psychology, and Zoology. 
Complete lists of titles and prices will be sent. 
jon request 
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