516 



SCIENCE 



[N. S. Vol. XLIX. No. 1274 



of $25,000 a year for a period of twenty-five 

 years from Sir John and Lady Eaton. This 

 is to provide for a full-time clinician in the 

 department of medicine and a half-time clin- 

 ician in pediatrics. 



The court of governors of the University 

 College of North Wales, at their meeting at 

 Bangor, appointed a deputation to "wait upon 

 the Board of Agriculture regarding the pro- 

 posal to have only two schools of forestry in 

 Great Britain — one in Scotland and the other 

 either at Oxford or Cambridge. Fears were 

 expressed that if this was carried into effect 

 it would mean the extinction of the forestry 

 department in connection with the University 

 College of l^orth "Wales. It was felt that one 

 of the two new schools should be established 

 in Wales, with its large area of forests. 



Sir Arthur Newsholme, K.O.B., who is 

 now in the United States has accepted for the 

 academic year 1919—1920, the chair of hygiene 

 in the new school of public health of the Johns 

 Hopkins Medical School. 



Charles Joseph Tilden, professor of civil 

 engineering at Johns Hopkins University, has 

 been elected professor of engineering mechan- 

 ics in Tale University and assigned to the 

 Sheffield Scientific School. 



Austin F. Eogers and Cyrus F. Tolman, 

 Jr., of the department of geology at Stanford 

 University, have been promoted from associate 

 professors to professors. 



Morris M. Leighton, Ph.D., Chicago, 1916, 

 has accepted a joint-position as assistant pro- 

 fessor of geology at the University of Illinois 

 and as Geologist on the Illinois Geological 

 Survey. 



At the Massachusetts Institute of Tech- 

 nology the following assistant professors have 

 been promoted to associate professorships: 

 H. C. Bradley, department of drawing and 

 descriptive geometry; C. E. Locke, department 

 of mining engineering and metallurgy, and 

 N. C. Page, department of electrical engineer- 

 ing. The following instructors have been ap- 

 pointed assistant professors : J. B. Babcock, 3d, 

 railroad engineering; S. A. Breed, mechanical 



drawing and descriptive geometry; L. A. 

 Hamilton, analytical chemistry ; H. B. Luther, 

 civil engineering; C. S. Robinson, industrial 

 chemistry; E. H. Smith, mechanical engineer- 

 ing; C. E. Turner, biology and public health. 



Mr. William Morris Jones. M.Sc, B.A., 

 has been appointed lecturer and experimental- 

 ist in physics at the University College, 



DISCUSSION AND CORRESPONDENCE 



QUANTITATIVE CHARACTER-MEASUREMENTS 

 IN COLOR CROSSES 



The writer, although working in plant and 

 not in animal breeding, has been struck with 

 the desirability of fijiding a more exact quan- 

 titative measure of degree of distribution of 

 coat color in animal crosses. The following 

 is suggested. Photograph the animal in a 

 centered position on its two flanks. On the 

 photographic prints of the right and left sides, 

 determine the area of the color markings 

 under investigation with a planimeter. These 

 areas, reduced to percentages of the entire 

 area photographed, will give a quantitative 

 expression for the degree of extension of the 

 character markings. The writex wbuld ven- 

 ture to suggest the following possibility in 

 the study of the operation of an extension 

 factor. Let the photographic prints be ruled 

 off in square centimeter areas with India ink. 

 Then the relation of the color areas to the 

 region of the animal's anatomy can be defi- 

 nitely established upon a quantitative basis. 

 This having been done for the parents, the 

 operation of an extension factor could be 

 studied both quantitatively with respect to 

 the amount of surface over which the factor 

 became operative, and topographically with 

 respect to the location and range of its op- 

 eration in the progeny. If desired, it would 

 be a comparatively simple matter to construct 

 a cross-wire screen behind which the animal 

 could be photographed, and which would thus 

 reproduce the areas to scale directly. 



In the study of inheritance in plants, the ap- 

 plication of this method suggests itself very 

 readily in color-inheritance in the seed-coats 

 of beans and other legimaes. By photograph- 



