SCIENCE 



Friday, Mat 10, 1918 



CONTENTS 

 The Industrial Fellowships of the Mellon In- 

 stitute : Dr. E. R. Weidlein 447 



The Effect of Cattle on the Erosion of Canon 

 Bottoms : Ds. James Terry Duce 450 



An Emergency Supply of Bubber: Harvey 

 MuNROB Hall and Thomas Harper Good- 

 speed 452 



Scientific Events: — 

 British Civil Service Estimates for Science 

 and Education; The American Medical Asso- 

 ciation and the War; The Interallied Scien- 

 tific Food Commission 454 



Scientific Notes and News 456 



University and Educational News 458 



Disctission and Correspondence : — 

 Astigmatism and Coma: Professor C. W. 

 WOODWORTH. Observations on the Auroral 

 Convergent: Dr. Lancaster D. Burling. 

 The Domestication of the Llama: N. HOL- 

 USTER. The Audibility of Sound: Pro- 

 fessor Charles E. Munroe 459 



Scientific Bools: — 



W.issler on the American Indian : Professor 

 R. B. Dixon 461 



Special Articles: — 

 Mass Mutation in Zea Mays: Professor 

 Hugo De Vbies 465 



The American Association for the Advance- 

 ment of Science: — 



Section E — Geology and Geography : Pro- 

 fessor Rollix T. Chamberlin 467 



MSS. intended far publicatioD and books, etc., intended for 

 review should ke sent to The Editor of Science, GarrisoD-on- 

 Hudson, N. Y. 



THE INDUSTRIAL FELLOWSHIPS OF 

 THE MELLON INSTITUTE^ 



I UA\E the honor, in the absence of Dr. Ray- 

 mond F. Bacon, director of the Mellon Insti- 

 tute, who was commissioned as a lieutenant- 

 colonel and is now in command of the Chem- 

 ical Service Section of the National Army in 

 France, to report to Science on the growth of 

 the industrial fellowship system of the Mellon 

 Institute, University of Pittsburgh. 



During the past year, twenty-one members 

 of the institute, including the director, as 

 noted above, and an assistant director, Mr. 

 William A. Hamor, who was commissioned as 

 major and is aide to Lieutenant-Colonel Bacon, 

 have entered government service in response to 

 their country's call. The following is a list 

 of the Industrial Fellows who have gone direct 

 from the Institute into service: 



F. O. Amon, First Lieutenant, Sanitary 

 Corps. 



H. S. Bennett, First Lieutenant, Sanitary 

 Corps. 



C. O. Brown, Captain, Ordnance Department. 



A. S. Crossfield, First Lieutenant, Sanitary 

 Corps. 



E. F. Ferguson, Private, Ordnance Depart- 

 ment. 



G. F. Gray, Captain, Signal Corps. 



R. B. Hall, Second Lieutenant, Chemical 



Service Section. 

 W. J. Harper, Second Lieutenant, Sanitary 



Corps. 

 C. E. Howson, First Lieutenant, Sanitary 



Corps. 

 C. N. Iry, Second Lieutenant, Engineers 



Corps. 

 E. H. Loeb, Second Lieutenant, Ordnance 



Department. 



1 For previous reports on this subject, see Dun- 

 can, Science, N. S., Vol. XXXIX. (1914), 672; 

 Bacon, ihid., XLIII. (1916), 453, and Bacon, ibid., 

 XLV. (1917), 399. 



