10 CARNEGIE INSTITUTION OF WASHINGTON. 



vestigators situated in universities, special research institutions, 

 government laboratories, museums, and industrial agencies scattered 

 widely over the country. No better illustration of our relation to 

 other work can be found than that shown in the long-standing 

 arrangement with Thomas B. Osborne, of the Connecticut Agricul- 

 tural Experiment Station, and L. B. Mendel, of Yale University. By 

 this plan Dr. Osborne and Dr. Mendel, considering the problems 

 of nutrition from different points of view but acting in closest co- 

 operation, carry on a series of studies on certain agents in nutrition, 

 including the vitamines, which are at the same time enormously im- 

 portant and extremely elusive. These researches are fundamental 

 scientific work in biology and chemistry. At the same time they are 

 of such importance in nutrition and medicine that the future of much 

 that is critical in these subjects will be dependent upon the work now 

 under way in the several laboratories of this country and Europe 

 giving special attention to this field. 



An extremely interesting example of cooperative investigation 

 by a department of the Institution and another important agency 

 in a related field is furnished by studies of the structure of matter 

 undertaken jointly by Mount Wilson Observatory and California 

 Institute of Technology. Investigations in the field of astrophysics 

 carried on with such extraordinary success at Mount Wilson have 

 shown that further advance in astronomical research requires a better 

 understanding of the nature of matter. At the same time it has been 

 clear that the researches in engineering at the California Institute 

 of Technology point constantly toward the need for better under- 

 standing of the structure of matter to further advance in engineering 

 knowledge. It has therefore seemed desirable for these two insti- 

 tutions to join forces in this special research and to bring to their 

 assistance a group of the most distinguished men available in the world. 



California Institute considers the problem of matter, in its well- 

 equipped physical and chemical laboratories, under the immediate 

 direction of such distinguished investigators as Dr. R. A. Millikan in 

 physics and Dr. A. A. Noyes in chemistry. Mount Wilson Observa- 

 tory makes use of the sun and stars and observes experiments in 

 progress with the aid of the telescope and the spectroscope. At 

 the same time the laboratories forming a part of the equipment of 

 the Observatory attempt to check, and in a measure reproduce, certain 

 of the effects seen or suggested by study of the sun. Cooperating 

 investigators, such as Professor H. A. Lorentz, of Haarlem, and 

 Professor Paul Epstein, formerly of Leiden, were brought to the 



