SCIENCE-ADVERTISEMENTS 



Marine Biological Laboratory 



Woods Bole, Mass. 



INVESTIGATION 



Eotira Year 



INSTRUCTION 



July 3 to August 13 

 19IS 



FaoUities for research in Zoolosy* 

 Embryology, Physiology and Bot- 

 any. Seventy-aix private labora- 

 tories, SlOO eaoh for not over three 

 months. Thirty tables are avail- 

 able for beginners in reaearoh who 

 deaire to work under the direction 

 of membera of the staff. The fee 

 for Buob a table is S50.00 



Courses of laboratory instruction 

 with lectures are offered in Inverte- 

 brate Zoology, Embryology, Physi- 

 ology and Morphology and Taxo- 

 nomy of the Algae. Each course 

 requires the full time of the student. 

 Fee, {60. A lecture course on the 

 Philosophical Aspects of Biology 

 ' and Allied Bciances is also offered. 



SUPPLY 

 DEPARTMENT 



Oy n tha £at£re Yoak 



Animals and plants, preserved, Uv- 

 ibg, and in embryonio stages. 

 Preserved material of all types of 

 animals and of Algae, Fungi, liver- 

 worts and Mosses furniAhed for 

 olaaswork, or for the museum. 

 . JAfinst material ftimished In season 

 aa ordered. Price lists of Zoological 

 snd Botanical material sent on ap- 

 plication. State which is dedred. 

 For price Esta and all information 

 regarding material, addreai 



OEO. H. GBAT. Corator, Woods Hole, Man. 

 Tba annual announcemnit will be sen t on application to Tha 

 Director, Marino Blologioal t*b6ratory. Woods Hole, Mass. 



A DICTIONARY FOR 

 EVERY LIBRARY 



GOULD'S 



MEDICAL 



DICTIONARY 



(THE PRACTITIONER'S) 



Flexible Cloth, Marbled Edges, a><^ me 

 Round Corners «PiC.I 



(With Thumb Index $3.25) 



71,000 Words 



Pronounced»Defined-°Derivation 



Includes many of the words of allied 

 sciences 



P. BLAKISTON'S SON & CO. 



Publishers PHILADELPHIA 



Catalogue of the Hemiptera of 

 America North of Mexico 



Excepting - the 

 Aphididae, Coccidae and Aleurodidae 



8y Edward P, Van Duzee Cloth, $5.50 



& Method for the Measurement of Self and Mutual 

 Inductances, by Fred. E. Pemot OS 



In Unusual Estenslon ' of the Distribution of the 

 Sblpworm In San Francisco Bay, California, by 



Albert L. Barrows ..........; 20 



On the Orientation of Erylhropsis, by Charles A. 



Kofoid and Olive Sweiy 16 



Crithidia JSuryophtJi^lmi, sp. noT. from the Hem- 



Ipteran Bug, Eurvophtlialmiis Convivus, Stal, 



by Jrene McCullooh. i 15 



rhe University oi California issues publications in the following 

 series among others: Agricultural Sciences; American Archae- 

 ology and Ethnology; Botany; Economics; Entomology; Geog- 

 raphy ; Geology ; Mathematics ; Pathology ; Physiology ; Psy- 

 chology ; Zoology ; Memoir^ of the University of California ; 

 Sulletiu and Publications of the Lick Observatory. 



Complete lists of titles and prices will be sent on request. 



UNIVERSITY OF CALIFORNIA PRESS 



Berkeley, California 260 Madison Are., New York 



The American Academy 

 of Arts and Sciences 



28 Newbury Street, Boston, Mass. 



Just issued. Proceedings, Vol, 62, Nos. 9, 10, 11. 



52 . 11. Crozier. W. J. — On the Pigmentation of a Poly- 

 clad. Pp. 723-780. 1 col. pi. May, 1917. 40 cents. 



52. 10. Thaxter, Koland. — New Laboulbeniales, chiefly 

 Dipterophilous American Species. Pp. 647-721. May, 1917. 

 $1.00. 



62. 9. Bridgman, P. W. — The Electrical Resistance of 

 Metals under Pressure. Pp. 571-646. February, 1917. 90 cents. 



Other recent Issues of the Proceedings 



62. 8. Wheeler, William Morton. — The Mountain Anta 

 of Western North America. Pp. 455-S69. January, 1917. $1.25. 



62. 7. Hitchcock, Frank Lauren. — A; Classiflcation of 

 Quadratic "Vectors. Pp. 369-4S4. S1.25 



62. 6. Wilson, E. B., and Moore, C. L. E. — Differential 

 Geometry of Two Dimensional Surfaces in Hyperspace. Pp. 

 267-368. November, 1916. $1.50. 



62. 5. Walton, A. C. — The ' Refractive J3ody ' and the 

 ' Mitochondria ' of Ascaris canis Werner. Pp. 253-266. 2 pis. 

 October, 1916. 40 cents. 



62. 4. Pierce, George W. — Theoretical Investigation 

 the Radiation Characteristics of an Antenna. Pp. 189-234, 

 October, 1916. $1.00. 



62. S. Bridgman, P. W. — Polymorphism at High Pres- 

 sures. Pp. 89-187. July, 1916. $1.00. 



62. 2. Bridgman, P. W. — The Velocity of Polymorphic 

 Changes between Solids. Pp. 53-88. July, 1916. SOoants. 



62. 1. Thaxter, Roland. — New or Critical Species o< 

 Chitonomyces and Rickia. Pp. 1-54. June, 1916. 70 cents. 



