August 19, 1921] 



SCIENCE 



149 



recreation, and E. R. Fenska, professor of for- 

 est engineering, both of the forestry college, 

 who are engaged in making a survey of the 

 65,000 acres of forested land contained in the 

 tract, will lecture to visitors every Saturday 

 in the Academy building at Tunesassa. 



The talks will include a personally con- 

 ducted hike through the forests and a study 

 of the flora and fauna encountered on the 

 trip. Valuable information about birds, 

 woods and wild animals common to that 

 section of the state will be given by the experts, 

 something that every person who goes into 

 the woods should know. The hike will be 

 followed by an illustrated talk on foresti-y, 

 particularly as the subject pertains to the 

 best use of the woods for recreation and health. 

 The lectures will be given every Saturday 

 until the vacation season ends. 



The efforts of the commission headed by A. 

 T. Fancher, of Salamanca, to make this great 

 forested region of mountains and valleys and 

 picturesque trout streams one of the most 

 attractive in the United States are bringing 

 forth excellent results. The large number of 

 tourists and campers who already have been 

 attracted to the park show the importance and 

 popularity of forest recreation. 



LECTURES AT THE UNIVERSITY OF MICHIGAN 



The following program of scientific lectures 

 has been given for the students of the sum- 

 mer session of the University of Michigan. 

 July 5 — Fever, Dr. C. W. Edmunds, professor of 

 therapeutics and materia medica, University of 

 Michigan. 

 July 12 — Cannes of mental disorder, Dr. A. M. 

 Barrett, professor of psychiatry, University of 

 Michigan. 

 July 14 — Niagara Falls and vicinity (illustrated). 

 Assistant Professor K. 0. McMurry, depart- 

 ment of geology, University of Michigan. 

 July 18 — The asteroids and rings of Saturn, Mr. 

 L. A. Hopkins, assistant professor of mathe- 

 matics and secretary of the colleges of engi- 

 neering and architecture. University of Michi- 

 gan. 

 July 19 — The nature of cancer, Dr. A. S. Warthin, 

 professor of pathology and director of the 

 pathological laboratory in the medical school, 

 University of Michigan. 



July 22 — How the psychologist tests intelligence 

 (illustrated), Mr. Guy M. Whipple, professor 

 of experimental education. University of Michi- 

 gan. 



July 26 — Practical points in the prevention and 

 treatment of cancer. Dr. C. V. Weller, assistant 

 professor of pathology. University of Michigan. 



July 29 — Michigan's inland laTces: their value to 

 the state (illustrated), Mr. I. D. Scott, asso- 

 ciate professor of physiographical geology, Uni- 

 versity of Michigan. 



Aug. 1 — The senses and the learning process in 

 fishes (illustrated). Dr. J. E. Beighard, profes- 

 sor of zoology and director of the zoological 

 laboratory and the zoological museum. University 

 of Michigan. 



Aug. 2 — Stone in the kidney, Dr. Hugh Cabot, 

 dean of the medical school. University of 

 Michigan. 



Aug. 4 — The nature of intelligence. Professor L. 

 L. Thurstone, of the Carnegie Institute of Tech- 

 nology. 



Aug. 8 — Functions in high-school mathematics, 

 Professor E. E. Hedrick, University of Missouri. 



Aug. 9 — Junior-high-school mathematics. Profes- 

 sor E. E. Hedrick. 



Aug. 10 — The conservation of health throvgh food 

 and drug inspection, Professor C. C. Glover, 

 secretary of the coUege of pharmacy. University 

 of Michigan. 



Aug. 12 — Acoustics of auditoriums (with experi- 

 mental demonstrations). Assistant Professor D. 

 L. Eich, department of physics. University of 

 Michigan. 



Aug. 17 — Modern theories of matter (illustrated), 

 Dr. E. F. Barker, department of physics, Uni- 

 versity of Michigan. 



Aug. 19 — Ten years of heredity (illustrated). 

 Professor A. P. ShuU, department of zoology. 

 University of Michigan. 



BOOKLETS OF THE AMERICAN ASSOCIATION 

 FOR THE ADVANCEMENT OF SCIENCE 



The office of the permanent secretary of the 

 American Association for the Advancement of 

 Science has recently published two booklets 

 that should be of interest to workers in sci- 

 ence and other friends of science. The first 

 of these, entitled " Resolutions bearing on 

 Important Features of the Public Welfare," 

 includes five resolutions that have already ap- 

 peared in the pages of Science, and it also 

 presents the list of general officers of the as- 



