SCIENCE 



,APR.i4l9l7:'^.;T 



Peiday, April 13, 1917 



CONTENTS 

 Food Values: Peofessor Graham Lusk 345 



Gravity and Isostasy: Dr. John F. Hatfoed. 350 



The National Academy of Sciences: Dr. A. L. 

 Day 354 



Scientific Events: — 

 Nitrogenous Compounds in Germany; The 

 Massachusetts Institute of Technology q/nd 

 Industrial Besearch; Chemistry and the War. 355 



Scientific Notes and Neivs 358 



University and Educational News 361 



Discussion and Correspondence: — 



The Song of the Grasshopper Sparrow: H. 

 A. Allaed. Decorative and Pictorial Art: 

 Margaret Armstrong. The Preservation of 

 Becords: John S. Weight 362 



Scientific BooTcs: — 

 Dunham on how to Jcnoio the Mosses: E. G. 

 Britton 363 



Special Articles: — 

 Pulverized Limestone and the Yield of Crim- 

 son Clover : Nicholas Kopelofp 363 



The Illinois State Academy of Science: J. L. 

 Peicer 365 



Societies and Academies: — 

 The Biological Society of Washington: De. 

 M. W. Lyon, Jr. The Anthropological So- 

 ciety of Washington: Frances Densmore. 367 



MSS. intended for publication and books, etc., intended for 

 rcTiew should be sent to Professor J. McKeen Cattell, Garrison- 

 On-Hudson, N. Y. 



FOOD VALUESi 



Suspicion often attaches the value of the 

 recommendations of the laboratory experi- 

 mentalist and this reaction may be more or 

 less well founded. In a delightful address 

 to medical students Simon Flexner recently 

 warned his audience not to think of coming 

 to him for medical treatment. A general 

 of the United States Army told me only 

 yesterday that a professor might be able to 

 hold his students to a complete examina- 

 tion upon the subject of the Thirty Years' 

 War, mark each student in accordance with 

 his deserts, and yet the professor might be 

 of the type who would get lost in his own 

 back yard. Such a danger besets the path 

 of him who would speak upon the subject 

 assigned to me to-night. It appears, how- 

 ever, that scientific knowledge of nutrition 

 has sufficiently advanced to make it of 

 some practical service to the people. Dr. 

 Mendel and I would not be speaking to- 

 gether here to-night did we not feel that we 

 had messages to deliver, and yet it must be 

 evident that in this country such messages 

 are merely personal opinions susceptible to 

 challenge and that they carry little weight 

 with the community. 



Many are familiar with the report of the 

 Eltzbacher Commission which concerned 

 itself with the food situation in Germany at 

 the outbreak of the war. The commission 

 was intended to bridge the chasm between 

 helpless specialization and superficial ver- 

 satility. Fifteen of the foremost scientific 

 men of the land approved the report. Mis- 

 takes were made, such as overestimates of 



1 Address delivered before the Home Economics 

 Assoeiation and the Society of Chemical Industry, 

 March 23, 1917. 



