EDITORIAL, 405 



Agriculture, IG members of the faculty of the Iowa State College, and 

 33 professors and experts from 17 other agricultural colleges and 

 experiment stations. In addition, lecture courses and seminars were 

 oifered by Dr. D. T, Macdougal. of the Carnegie Institution, of Wash- 

 ington; Prof. J. 8. Pray, professor of landscape architecture of 

 Harvard University ; Dr. W. E. Castle, professor of zoology of Har- 

 vard University ; and Dr. C. AV. Gay, professor of animal husbandry 

 of the University of Pennsylvania. The international relations of 

 the school were brought out by the very interesting and valuable 

 lectures given by Dr. E. von Tschermak, professor of plant breeding 

 in the Royal Imperial College of Agriculture of Vienna, Austria; 

 Dr. J. C. Ewart, professor of natural history of the University of 

 Edinburgh, Scotland; and Prof. G. E. Day, professor of animal hus- 

 bandry of the Ontario Agricultural College, Guelph, Canada. 



The more general interest of the session naturally centered in the 

 courses in plant physiology and pathology and animal hnsbanclry. 

 In the former, principles of plant breeding were discussed by Doctor 

 AVebber, of Cornell University ; Doctor von Tschermak ; Doctor Mac- 

 dougal ; and Doctor Stone, of the Massachusetts Agricultural College, 

 with special reference to their own investigations in various branches 

 of this subject. Dean Bessey, of the University of Nebraska, treated 

 of plant eggs and sperms, embryology, and the relations of the sun 

 and water to the growth of plants. Different problems in plant 

 pathology were presented by Mr. Haven Metcalf, of the Bureau of 

 Plant Industry ; Doctor Stevens, of the North Carolina Agricultural 

 College; and Doctor Pammel, of the Iowa State College. Consid- 

 erable attention was given to methods of investigation and teaching. 



In the course in animal husbandry Doctor Castle gave most in- 

 structive and inspiring lectures on the principles of heredity appli- 

 cable to animal breeding, which were illustrated by his own researches 

 with rodents. Doctor Ewart treated in a very clear and forceful 

 manner a number of breeding problems to the solution of which his 

 own investigations have notably contributed, such as transmission of 

 acquired characters, telegony, saturation, maternal impressions, in- 

 fluence of environment, intercrossing, inbreeding, and prepotency. 

 President AVaters, of the Kansas State Agricultural College, discussed 

 the factors affecting type, form, and quality of carcass, with special 

 reference to investigations conducted under his supervision at the 

 Missouri Experiment Station. Professor Eckles, of the University 

 of Missouri, summarized the results of his investigations in feeding 

 and breeding dairy cows. Doctor Armsby, of the Pennsylvania State 

 College, gave an account of his recent investigations with the respira- 

 tion calorimeter on the maintenance requirements of farm animals, 

 in continuation of work presented at former sessions of the school. 

 Mr. E. AA'. Morse, of this Office, gave two lectures embodying special 



