TABLE OF CONTENTS. 



Page. 



Letter of Transmittal .' iii 



Constitution of the Michigan Academy of Science 7 



By-Laws of the Michigan Academy of Science 10 



Officers of the Michigan Academy of Science 14 



Membership of the Michigan Academy of Science 15 



Michigan Academy of Science Exchanges 19 



Israel Cook Russell 48 



List of Papers Presented at the Thirteenth Annual Meeting of the Michigan Academy of 



Science 32 



Pipers Published in this Report: 



President's Address: Some Physiological Variations of Plants and their General Signi- 

 ficance, James B. Pollock 35 



Public Address by Prof. Wm. H. Hobbs: Eartliquakes Viewed in a New Light 43 



The Water Sj'stems in Plants, J. B. Dandeno 57 



Vegetative Reproduction in Erythroniuni Americaiuun, J. B. Landeno C4 



Life History of Puccinia Malvacearum, J. B. Dandeno 68 



Notes on the Black Knot of Plum, J. B. Dandeno 74 



Planning an Experiment to Show to what Extent Bumblebees Aid in Pollinizing Red 



Clover, W. J. Beal 76 



The Bud Scales of Calastrus Aid the Vine in Chmbing, W. J. Beal 78 



Phyllody of the Stamens and Petals of Nymphaeae (Nuphar) Advena, W. J. Beal. ... 79 



Fomes Pinicola Fr., L. H. Pennington 80 



Unreported Fungi for 190G, C. H. Kauffman 83 



Flora" of the Marquette Quadrangle, Alfred Dachiiowski 88 



Flora of Southwestern Michigan, H. S. Pepoon 104 



Contribution to the Botanical Survey of the Huron River Valley, Alfred Dachnowski . . 113 



Observations on the Crataegi in the Vicinity of Port Huron, C. K. Dodge 123 



The Characaceae of Michigan, Ellen B. Bach 126 



On the Distribution of Acer Spicatum and Acer Pennsylvanicum in the Northern Penin- 

 sula of Michigan, Chas. A. Davis 127 



Crataegus in SoutUern Michigan, C. S. Sargent 129 



Some Interesting Glacial Phenomena in the Marquette Region, Chas. A. Davis 132 



Geology and Physical Geography of Michigan, W. F. Cooper 136 



Formaldehyde Disinfection by Means of Potacsium Permanganate, E. M. Houghton, 



L. T. Clark 145 



Immunity as Based Upon the Theory of Opsonins, A. P. Ohlmacher 148 



The Influence of the Composition of the Medium Upon the Solvent Action of certain 



Soil Bacteria, Chas. W. Brown T 160 



The Significance and Control of Starters Employed in Ripening Cream and Milk, L. D. 



Bushnell 163 



Some Records of the Fall Migration of 19C6, N. A. Wood 166 



Museum Methods, F. S. Hall 172 



The Geological Continuity of Essex and Kent Counties, Ontario and Monroe and Wayne 



Counties, Michigan, Rev. Thos. Nattress 177 



Index 187-195 



