SCIENCE— ADVERTISEMENTS 



RECENT ISSUES 



IN GEOLOGY 



The Briones Formation of Middle 

 California, by Parker D. Trask. 

 Price, 75 cents. 



Genesis of the Ores of the Cobalt 

 District, Ontario, Canada, by Al- 

 fred R. Whitman. Price, 80 

 cents. 



Geology of the Cuyamaca Region of 

 California with special reference 

 to the origin of the nickeliferous 

 pyrrhotite, by F. S. Hudson- 

 Price, $1.25. 



University of California Press 



Berkeley, California. 



CARNEGIE INSTITUTION OF WASHINGTON 



DEPARTMENT OF EMBRYOLOGY 



This Department, organized in 1914, has issued 

 14 volumes, comprising 65 contributions to em- 

 bryology. The volumes are quarto in form and 

 well illustrated, many of the plates being colored. 

 The total pagination is 2,447, with 239 plates, 236 

 te.xt figures, and 21 charts. An especially notable 

 volume is publication 272, which was brought out 

 as a memorial volume to Franklin P. Mall, who 

 organized the Department and directed it during 

 its early years. As indicating the general charac- 

 ter of the-volumes, the titles of publication No. 

 277 are listed below. This volume is now in 

 press and is not included in the statistical state- 

 ment above : 



Sabin, F. R.— Direct Growth of Veins by Sprouting. 



Buell, C. E.— Origin of Pulmonic Vessels in the Chick. 



Doan, C. A.— The Capillaries of the Bone Marrow of 

 the Adult Pigeon. 



Congdon, E. G.— Transformation of the Aortic Arches 

 and Related Vessels in the Human Embryo. 



Streeter, G. L. — Development of the Auricle in the 

 Human Embryo. 



Wollard, H. H.— The Development of the Principal 

 Arterial Stems in the Forelimb of the Pig. 



Finley, E. B.— Angiogenesis in the Subcutaneous Tis- 

 sues of the Head of the Human Embryo. 



Anyone wishing further information can, on 

 application to the Carnegie Institution of _ Wash- 

 ington, obtain a list stating the titles in full, 

 authors, and the extent of all the contributions 

 referred to above. 

 CARNEGIE INSTITUTION OF WASHINGTON 



WASHINGTON, D. C, U. S. A. 



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