96 Scientific Intelligence. 



428, Cambridge, 1921 (Cambridge University Press). This 

 volume contains sections IV and V of the author's Experimental 

 Physics and may be described as a laboratory manual of high- 

 school, or first year college grade. It contains directions for a 

 large number of experiments, together with numerous problems 

 to test the student's understanding of the principles involved. 

 It is self-contained in that it does not require the study of any 

 other text. The press work is inferior. f. e. b. 



10. Physik und Erkenntnisstheorie ; by E. Gehrcke, Pp. II, 

 119. Leipzig, 1921 (B. G. Teubner). — This brochure is an exam- 

 ination of the fundamental postulates and principles of physics 

 considered as a system of philosophy. Its scope is about that 

 of the order of a doctor's dissertation. The author does not 

 appear to be particularly sympathetic toward the Einstein 

 hypothesis. p. e. b. 



11. Series Trigonometrique; by Maurice Lecat. Pp. VIII, 

 168. Louvain, 1921 (Chez l'Auteur). This is a very complete 

 bibliography of the subject indicated. The author index occu- 

 pies 133 pages, and a list of the journal and collections cited fills 

 16 pages more. Supplementary tables show the distribution of 

 the articles according to geographical location, language, and 

 university. The appendix contains a list of papers on the Cal- 

 culus of Variations which have appeared during the period 1915 



to 1920. F. E. B. 



12. Die Grundlagen der Geometric; by Lothar Heffter, 

 Pp. II, 27. Leipzig, 1921 (B. G. Teubner).— A discussion of 

 the fundamental postulates of geometry. The treatment pos- 

 sesses such rigor as has been deemed necessary that they may 

 serve for the foundation of analytical and projective geometry 

 as developed in the two volume Lehrbuch der Analytische 

 Geometric of the author. f. e. b. 



n. Geology. 



1. A prehistoric Human Skull from Rhodesia — Nature of 

 November 24 states that the new skull from Rhodesia was exhib- 

 ited by Dr. A. Smith Woodward at a meeting of the Zoological 

 Society on November 22. The skull, which was found in the 

 Broken Hill Mine at a depth of 60 ft. below the water-level and 

 90 ft. below ground level, is in a remarkably fresh state of preser- 

 vation. It is much broken on the right side and the lower jaw 

 is missing. The brain-case is of modern human type, and the 

 bone not thicker than that of the ordinary European; the 

 capacity, though not yet accurately determined, is clearly above 

 the lower human limit. The orbits are large and square, with 

 pronounced overhanging ridges much extended laterally. The 

 forward position of the foramen magnum indicates that the skull 



