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THE 

 PRINCIPLES OF 

 STRATIGRAPHY 



BY 

 AMADEUS W. GRABAU, S.M., S.D. 



PROFESSOR OF PALEONTOLOGY IN 

 COLUMBIA UNIVERSITY 



"Should be on the reference shelf of every col- 

 lege, normal echool. and large high school in the 

 United States." — Journal of Geography, Vol. XIII, 

 Jan. 1915. 



8vo, 1150 pages, 234 iUattration: Prict, $T.SO 



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Problems in the Calculus 



By DAVID D. LEIB 



Yale University 



The primary aim of tliis book is to pro- 

 vide a graded collection of problems in the 

 field of calculus. It is sufficiently varied 

 to be used as a supplement to any course. 

 Many of the problems are of a kind not 

 found in the ordinary textbook. A brief 

 description precedes each list of problems 

 in which new laws and formulas are em- 

 ployed. This is also a helpful discussion 

 of the technique involved and the common 

 errors to be avoided. 



No other such comprehensive book is 

 now available to American students. 

 224 pages. $1.00 



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UNIVERSITY OF CALIFORNIA 

 PUBLICATIONS 



Th» University of California Issues publications in the 

 ffollowinff series am ne othersi 



.Agricultural Science Mathematics 



American Archeology Pathology 



and Ethnology Pliilosophy 



Botany Physiology 



Economics Psychology 



Geology Zoology 



Memoirs of the University of California 

 Bulletin and Publications of the Lick Observatory 



RECENT TITLES 



Ceremonies of the Pomo ladians, by S. A. Barrett 45 



Porno Bear Doctors, by S. A. Barrett 25 



The Position of Yana in the Yokan Stock, by Edward 



Sapir 35 



Aphididae of California. New Species of Aphididae and 

 Notes from Various Parts of the State, but chiefly 

 from the Campus of the University of California, 

 by E. O. Essig 45 



Asoidians of the Littoral Zone of Southern California, 



by W. E. Ritter and Ruth A. Forsyth 1.00 



A Distributional List of the Amphibians and Reptiles of 



California, by Joseph Grinnell and Charles L. Camp .85 



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Publications of 

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The publications of the Institution now number over 300 

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251. Papers from the Department of Marine Biology of the 

 Carnegie Institution of Washington. Vol. XI. Octavo, 366 

 pp., 21 pis., 59 figs S5.00 



This book contains the following papers, not sold separately : 



Mayer, A. G. — Nerve- conduction in Cassiopea xamachana. 



McCIendon, J. F., et al — The Hydrogen Ion Concentration, 

 C02 Tension and COa Content of Sea-water. 



Goldfarb, A. J. — Variability of Eggs and Sperm of Sea-urchins. 



Hatai, S. — On the Composition of the Medusa Cassiopea 

 xOfTnachana. 



Phillips, A. H. — Analytical Search for Metals in Tortugas 

 Marine Organisms. 



Gary, L. R. — Physiology of the Nervous System of C 

 xamachana. 



Clark, H. L. — Habits and Reactions of a Comatulid. 



Harvey, E. N. — Chemistry of Light-production in Luminous 

 Organisms. 



Harvey, E. B. — A Physiological Study of Specific Gravity 

 and of Liuninescence in Nodiluca. 



Treadwell, A. L. — Polychaetous Annelids from Florida, Porto 

 Rico, etc. 



Jordan, H. E. — Microscopic Structure of Striped Muscle of 

 IattiuIus. 



Jordan, H. E. — Hemopoiesis in the Mongoose Embryo, with 

 special reference to the Activity of the Endothelium. 



Jordan, H. E. — Embryonic History of the Germ-ceUs of the 

 Loggerhead Turtle, Caretta caretta. 



Jordan, H. E. — Atresia of the Esophagus in the Loggerhead 

 Turtle Embryo. 



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