TABLE OF CONTENTS. 
Title page 
Letter of Transmittal 
Table of Contents. 
Officers for 1911-1912 
Membership list and affiliated societies 
Report of the Treasurer 
Complete list of papers and addresses presented at the Seventeenth Annual Meeting 
of the Michigan Academy of Science . • • ‘ 
Papers published in this report: 
1. President’s Address — Recent Achievements in Parasitology, F. G. Novy. . 
2. Resistance of Trypsin to High Temperatures, W. E. Forsythe 
3. Soil and Soil Problems from the Standpoint of the Physicist, J. A. Jeffery. . 
4. Soil and Soil Problems from the Standpoint of the Chemist, A. J. Patten. . 
5. Soil and Soil Problems from the Standpoint of the Microbiologist, Otto 
Rahn , 
6. Soil and Soil Problems from the Standpoint of the Botanist. W. IT. Brown. . 
7. The Theory and Practice of Soil Management, Frank K. Cameron 
8. Relation of Rural Highways to the Conservation of Michigan’s Resources, 
Frank F. Rogers ' 
9. Progress of the Geological and Biological Survey of Michigan: 
a. Geology and Topography, R. C. Allen 
b. Biology, A. G. Ruthven 
10. Preliminary Report on the Salt Industry of Michigan, C. W. Cook 
11. The Extent of the Anderdon Beds of Essex County, Ontario, and their 
Place in the Geological Column, Rev. Thomas Natti’ess 
12. The Spermatogenesis of an Orthopteron, Ceutophilus latebricola Scudder, 
with Special Reference to the Accessory Chromoseme, Crystal Thompson 
13. Notes on the Amphibians of Cass County, Michigan, Crystal Thompson. . . . 
14. Report on the Crustaceas Collected by the Michigan- Walker Expedition 
in the State of Vera Cruz, Mexico, A. S. Pearse 
15. Notes on Michigan Reptiles and Amphibians, III. A. G. Ruthven 
16. The Concological Survey of Michigan, Bryant Walker 
17. A Check-List of Michigan Mollusca, Bryant Walker 
18. Notes on Michigan Crustaceae, A. S. Pearse 
19. Results of the Mershon Expedition to the Charity Islands, Lake Huron 
Mammals, N. A. Wood 
20. Notes on a Palaemon from Kamerun, A. S. Pearse 
21. Observations on the Mammals of the Douglas Lake Region, Cheboygan 
County, Michigan, Orrin J. Wenzel 
22. Odonata Collected in the Douglas Lake Region in the Summer of 1910, 
Abigail O’Brien 
23. The Orthoptera Collected at Douglas Lake, Michigan, in the Summer of 
1910, Alvalyn E. Woodward 
24. Results of the Mershon Expedition to the Charity Islands, Lake Huron. 
Preliminary Report of the Coleoptera, A. W. Andrews 
25. The Occurrence of a Cremaster Muscle in a Woman, G. Morris Curtis 
26. Results of the Mershon Expedition to the Charity Islands, Lake Huron — 
Plants — C. Iv. Dodge " 
27. Outline Key of the Genus Helianthus in Michigan, S. Alexander 
28. A Retrogressive Metamorphosis Artificially Produced, S. Alexander 
29. Psychotria undata as a Coffee Plant, Ernst G. Bessey 
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