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PHYSICS 



PALMER— The Theory of Heasurements 



By A* de FOREST PALMER, Ph.D. 



Associate Professor of Physics in Brown University. 

 248 pp. with Tables and Diagrams. S2.50 (10/6) net, postpaid. 

 A thorough discussion of the principles underlying the precision of meas- 

 urements, and the development of suitable methods of measurement for 

 special purposes. 



NORTHRUP— riethods of Heasuring Electrical Resistance 



By EDWIN F. NORTHRUP, Ph.D. 



389 pp. Illus. $4.00 (17s) net, postpaid. An authoritative treatise of 

 value not only to physicists and teachers but to men in practice as well. 

 It describes and gives methods, simple measurements, details of instru- 

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CHEMISTRY 



International Chemical Series 



HENRY p. TALBOT, Ph.D., Consulting Editor 



The first volumes in this series have had a gratifying reception. Each 

 has been adopted already in several institutions. 



NORRIS— The Principles of Organic Chemistry 



By JAMES F. NORRIS, Ph.D. 



Professor of Chemistry, Simmons College, Boston. 

 570 pp.,5ix8. Illustrated. $2.50 (10/6) net, postpaid. 



CADY— Inorganic Chemistry 



By HAMILTON PERKINS CADY, A.B., Ph.D. 



Professor of Chemistry, University of Kansas. 

 629 pp., 5^xS. Illustrated. $2.50 (10/6) net, postpaid. 



MINERALOGY HiSCELLANEOUS 



STUDY OF MINERALS RAILROAD CONSTRUCTION 



A Combined Text Book and Pocket Manual p_.^j ^ ^ Crandall, and F. A. Barnes, 



By Austin Flint Rogers, Ph.D., Assoc. Prof- - . . ^r, nn 



Leland Stanford Univ. 522 pp. 5x7i. Flex- Cornell University. 305 pp. lUuB. $3.00 



ible leather. S3.50 (158) net, postpaid. (12/6) net, postpaid. 



PETROQRAPHIC METHODS REFRACTORIES AND FURNACES 



By E. Weinschenk. Trans, by Robt. W. g p .j. Havard, Associate Professor, Univ. 



Clark, Instructor in Petograpby, Univ. of , „t. ■,^o t,i »^ nn /■1"»„^ 



Michigan. 396 pp. 371 Illus., $3.50 (153) net, of Wisconsin. 356 pp. Illus. $4.00 (17s) 



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