Geology. 375 



10. The Nomenclature of Petrology; by Arthur Holmes. 

 Pp. 284 (16mo). London, 1920 (Thomas Murby and Co.).— - 

 This excellent booklet is in the main a dictionary of petrologie 

 terms. It defines about 1,300 names, giving the prevailing usage 

 of each term, tlie original author and the date of its first use, 

 and for the rock names the type localities. References are given 

 for many terms, so that the subject matter can readily be traced 

 to original sources. Appendices include not only French and 

 German petrographic terms, briefly defined in English, but also 

 the many Greek and Latin words whose roots enter into the 

 nomenclature of petrology. The volume can be commended as 

 filling a real want. adolph knopf. 



IIL Miscellaneous Scientific Intelligence. 



1. Carnegie Institution of Washington; Robert S. Wood- 

 ward, President. Year Book No. 19, 1920. Pp. xii, 424; illus- 

 ti-ated. AVashington, January, 1921 (published by the Institu- 

 tion). — This nineteenth Year Book of the Carnegie Institution, 

 for 1920, is of particular interest because of the fact that the 

 president, who has guided the affairs of the Institution so wisely 

 for many years, announces his retirement, and that his place is to 

 be taken by Dr. John C. Merriam, formerly of the University of 

 California and elected to this new position on May 25, 1920. 

 Other important personal changes have arisen through the death 

 of the trustee, Mr. Henry L. Higginson, and of two associate 

 investigators, William Churchill and Harmon N. Morse. To 

 each of them, the President refers with keen appreciation of their 

 life's work. 



On the financial side, it is to be noted that of the total appro- 

 priations of $1,554,000.00, $927,000.00 has gone to the twelve 

 large grants; $173,000.00 to minor grants; $250,000 has been 

 placed in the reserve fund, and the balance has been expended for 

 publications, administration, and insurance and pension funds. 

 The publications of the year include 22 volumes of 3,840 octavo 

 and 3,710 quarto pages ; 16 additional volumes are now in press. 

 The total number of volumes issued since 1902 is 424, embracing 

 nearly 119,000 pages of printed matter. The president's report 

 is followed by the statements of the departments bj^ their respec- 

 tive directors, each giving the results of work accomplished and 

 all of so much value, that it is not possible to go into detail. 

 Perhaps the reader will turn with special interest to Dr. Mac- 

 Dougall's account of the work of the Botanical Research Labor- 

 atory^ at Tucson and at Carmel, California; that of Dr. Street 

 on embryology ; of Dr. Davenport on experimental evolution ; of 

 Dr. Mayor, on marine biology, at Tortugas, Florida; of Dr. 

 Hale, at the Mount Wilson Observatory ; of Dr. Bauer on terres- 

 trial magnetism. In connection with the last-named, it is inter- 

 esting to note the recent statement in ''Science" that the magnetic 

 survey yacht, Carnegie, arrived in San Francisco on Februarj^ 



Am. Jour. Sci. — Fifth Series, Vol. I, No. 4.— April, 1921. 



