196 REPORTS o^ inve;stigations and proje;cts. 



by Prof. N. V. Ussing-, of Copenhagen. The results of this will appear this 

 year in the American Journal of Science. An analysis was made of the 

 trachyte of Monte Axpe, near Bilbao, Spain, the material having been fur- 

 nished by Seiior Fernandez-Navarro, of Madrid. A short note is to be 

 published concerning this, the full description of the occurrence being under- 

 taken by Senor Navarro. It is purposed, during the coming year, to study 

 the igneous rocks collected in Sardinia, as well as those from the volcanoes 

 of Agde and Montpellier for comparison, material from these last having 

 been kindly sent to Dr. Washington by Professor Lacroix. 



It is estimated that about 30 analyses remain to be made, and that the 

 investigation of the comagmatic region will not be completed in less than a 

 year. 



GEOPHYSICAL RESEARCH. 



Adams, F. D., McGill University, Montreal, Canada. Grant No. 335. 

 Continuation of investigation into the Hoiv of rocks. (For previous re- 

 ports see Year Book No. 2, p. xxxiv; Year Book No. 3, p. 119; Year 

 Book No. 4, pp. 230, 231, and Year Book No. 5, pp. 174, 175.) $1,500. 



The work of measuring the amount of internal friction developed in certain 

 rocks when under conditions of very slow deformation, which occupied the 

 greater part of last year, was continued in the early part of the present year. 

 It was interrupted by the burning of the engineering building of McGill Uni- 

 versity, in which the large 100-ton testing-machine employed in this work 

 was set up. This machine, however, was not injured by the fire, and the 

 work will be resumed upon the completion of the new engineering building, 

 which is now in course of erection. 



The work of measuring the cubic compressibility of rocks by Richards & 

 Stull's method, which is being carried on in conjunction with Professor 

 McKergow, was also continued during the past year. Certain experimental 

 difficulties, however, not having been as yet overcome, satisfactory results 

 have not yet been secured. The solution of these difficulties is looked for 

 during the coming year. 



The experimental work carried on during the past year was chiefly along 

 two lines : 



(i) The deformation of the various rocks which are under examination, 

 at much higher temperatures than those which it had been possible to 

 formerly attain. Temperatures up to 1,000° C, combined with great pres- 

 sures, have been secured, and the deformation of diabase, essexite, and other 

 basic crystalline rocks has been studied under these conditions. 



(2) An investigation has been commenced with a view to determining the 

 depth beneath the earth's surface of the zone of flow in the case of granite 

 and Solenhofen lithographic stone respectively. This consists in submitting 



