GEOLOGY — CHAMBERLIN, WASHINGTON. I95 



GEOLOGY. 



Chamberlin, T. C, University of Chicago, Chicago, Illinois. Grant No. 

 415. Study of fundamental problems of geology- (For previous reports 

 see Year Book No. 2, pp. 261-270; Year Book No. 3, pp. 195-258; Year 

 Book No. 4, pp. 171-190, and Year Book No. 5, pp. 166-172.) $6,000. 



The work of Dr. Chamberlin and his collaborators, Dr. F. R. Moiilton, 

 Dr. A. C. Lunn, and Dr. Julius Stieglitz, has followed closely the lines set 

 forth in Year Book No. 5, pages 166 to 172. Much time has been occupied 

 with certain subsidiary inquiries which have arisen in the development of the 

 leading subjects, and which were found to be of essential importance in their 

 bearings on them. Some of these have involved unexpected difficulties of 

 treatment and have caused great labor, but in the end they have given satis- 

 factory results. These auxiliary studies will add two or three more papers 

 to the series outlined in the report of last year. In the expectation of the 

 early publication of the whole series of studies, it is not thought advisable 

 to enter upon details here. 



Washington, Henry S., Locust, New Jersey. Grant No. 95. Chemical 

 investigations of igneous rocks. (For previous reports see Year Book 

 No. 3, p. 113 ; Year Book No. 4, p. 158, and Year Book No. 5, p. 172.) 



$1,200. 



The year has been chiefly devoted to the further chemical analysis and 

 study of the igneous rocks collected in 1905, 25 new analyses and many 

 detenninations of minor constituents to complete the older ones having been 

 made. A paper entitled "The titaniferous basalts of the Western Mediter- 

 ranean" was read before the Geological Society of London and published in 

 its Quarterly Journal, and the extended discussion of the chemical conditions 

 which control the formation of leucite in igneous rocks was completed and 

 published in the Journal of Geology. A paper giving the results of the study 

 of the volcanic rocks of Catalonia, with 7 analyses, was published in the 

 American Journal of Science, and another describing the volcanoes and 

 igneous rocks of the island of Linosa, with 6 analyses, is to appear in the 

 Journal of Geology this winter- Dr. Washington is at present particularly 

 engaged in a study of the igneous rocks of the island of Pantelleria, of which 

 15 analyses have been made. This will probably appear during the winter. 

 In conjunction, with Dr. F. E. Wright, of Washington, who undertakes the 

 optical side of the investigation, the peculiar amphibole of Linosa and the 

 closely similar kaersutite of Greenland are being studied, a complete analysis 

 of each having been made. The material for the latter was kindly furnished 



