308 



SCIENCE 



[N. S. Vol. XLV. No. 1161 



the medical scliool of the University of Pitts- 

 burgh; Dr. Winfield Scott Hall, professor of 

 physiology, Northwestern University, and Dr. 

 James C. Wilson, emeritus professor of the 

 practise of medicine and of clinical medicine, 

 Jefferson Medical College. 



UNIVERSITY AND EDUCATIONAL 

 NEWS 



" GiLMAN Hall " has been decided upon as 

 the name of the first unit, now being built at 

 a cost of $220,000, of the future group of per- 

 manent buildings for chemistry at the Uni- 

 versity of California. This name was chosen 

 by the regents in honor of Daniel Coit Gihnan, 

 president of the University of California from 

 1872 to 1875, to whose initiative was due the 

 organization of the college of chemistry of the 

 imiversity, and who in his later career as 

 president of Johns Hopkins University did 

 such notable service to the development of 

 opportunities in the American universities for 

 training for scientific research. 



GoucHER College has announced the com- 

 pletion of a " Supplemental Endowment 

 Fund " of $1,000,000, one fourth of which was 

 conditionally subscribed by the General Edu- 

 cation Board. Wearly half of the entire 

 amount has already been paid in. 



A BILL introduced into the Illinois legisla- 

 ture proposes expenditures for the medical de- 

 partment of the University of Illinois amount- 

 ing to $2,000,000 during the next decade. 



Mrs. Alexander F. Morrison, formerly 

 president of the National Association of Col- 

 legiate Alumnss, has given $1,500 to the Uni- 

 versity of California for the purchase of an 

 ophthalmological library of 486 volumes for 

 the University of California medical school. 



Mrs. Eoscoe R. Bell, of Brooklyn, has 

 given the valuable library on comparative 

 and veterinary medicine belonging to the late 

 Professor Eoscoe E. Bell, to the Alexandre 

 Liautard Library of New York University. 



Dr. Ellsworth Huntington, who resigned 

 from Tale University several years ago to de- 

 vote his entire time to research work, will be- 

 come officially connected with the university 

 again next year as a research associate in 



geography. Dr. Huntington will make his 

 headquarters in New Haven and wiU give 

 every year a course of lectures on his inves- 

 tigations, which cover a broad field that has 

 to do particularly with the effect of climatic 

 changes on the course of civilization. 



There has been appointed at the Massa- 

 chusetts Institute of Technology a committee 

 of the faculty to consider ways of improving 

 the methods of instruction and Dr. Charles E. 

 Mann has been called to the institute to be 

 chairman of the committee. Dr. Mann is pro- 

 fessor of physics in the University of Chicago, 

 but for the past two years has been on leave 

 of absence to make a report on engineering 

 education under the auspices of the Carnegie 

 Foundation for the Advancement of Teaching. 



DISCUSSION AND CORRESPONDENCE 



MORE "MOTTLE-LEAF" DISCUSSION 



In a recent paper Briggs, Jensen and Mc- 

 Lane^ discuss the situation with regard to 

 " mottle-leaf " in citrus trees based on cer- 

 tain observations which they have made on 

 orchards located in southern California. The 

 undersigned has read their statement with the 

 greatest interest and desires in the friendly 

 spirit of a scientific colleague to make some 

 comments thereon by way of broadening the 

 discussion. 



1. In reviewing the causes which have been 

 given in the past for the production of 

 " mottle-leaf " conditions, the authors above 

 named mention the theories of Smith and 

 Smith^ and of Thomas^ but say nothing of 

 that promulgated in 1914 by the undersigned* 

 which still seems to me to be the most definite 

 and reasonable hypothesis for explaining the 

 conditions in question in citrus trees. 



2. Briggs, Jensen and McLane have pointed 

 out that about half of the " mottling " is asso- 

 ciated with soil conditions in which humus is 



1 Jour. Agr. Bes., Vol. 6, No. 19, p. 721, August, 

 1916. 



2 Calif. Agr. Expt. Sta. Bull., No. 218, pp. 1139- 

 1911. 



s Calif. Agr. Bxpt. Sta. Circ, 85, 1913. 

 i Science, N. S., Vol. 39, No. 1011, p. 728, May, 

 1914. 



