TABLE OF CONTENTS. 
Title page 
Letter of Transmittal 
Table of Contents 
Officers for 1913-1914 
Membership List 
Minutes of the meetings 
Report of the Treasurer 
General Program rendered at the meeting 
Papers published in this Report 
The Origin of Continental Forms, IV., Howard B. Baker 
Studies in Structure and Stratigraphy in the Saginaw Valley in Relation to Oc- 
curances of Oil and Gas, R. A. Smith 
A Geographic Study of the Growth and Distribution of Population in Michigan, 
O. W. Freeman 
Gold Deposits of the Porcupine District of Ontario, R. E. Hore 
Ripple Marked Huronian Quartzite at Nipissing Mine, Cobalt, Ontario, R. E. Hore 
The Nature of Enzyme Action, J. G. Cumming 
A Bacterial Disease of the Larvae of the June Bug (Lachnosterna sp.), Zae North- 
rup 
The Environment of Soil Bacteria, F. H. Hesselink van Suchtelen 
The Influence of Bacterium Lactis Acidi on the Changes Caused in Milk by Some 
of the Common Milk Organisms, C. W. Brown 
Ozone as a Means of Water Purification, R. W. Pryer 
Farm Organization as a Factor in Rural Economics, W. O. Hedrick 
Secret Remedies, Nostrums and Fakes, W. S. Hubbard 
Psychological Antithesis of Socialism, H. A. Miller 
The Taxation of Local Public Utility Corporations in Michigan, E. H. Ryder. . . 
The Breeding Habits of the Log Perch (Percina caprodes), Jacob Reighard 
An Adult Diemyctylus with Bifurcated Tail, B. G. Smith 
A Sarcoptid Mite in the Cat, Harold Cummins 
The Origin of Continental Forms, III, Floward B. Baker 
Notes on the Mortality of the Young of Wild Birds Under Natural Nesting Con- 
ditions and Under Artificial or Protected States, Jefferson Butler 
The Factors that Determine the Distribution of Boleosoma Nigrum in Douglas 
Lake, Cheboygan County, Michigan, IL. V. Heimburger 
The Oxygen Content of the Waters of Douglas Lake, Cheboygan County, Michi- 
gan, D. A. Tucker 
Some Observations on Intestinal Villi, O. M. Cope 
The Antitoxic Action of Chloral Hydrate upon Copper Sulphate for Pea Seed- 
lings, R. P. Hibbard 
Improved Methods for the Quantitative Determination of Dilute Solutions of 
Electrolytes, R. P. Hibbard 
Some Notes on the Black Knot of Plums, J. A. McClintock 
The Pine Hills at Lowell, Michigan, B. E. Quick 
The Flora of Parkedale Farm, Rochester, Michigan, O. A. Farwell 
Some Interesting Plants from the Vicinity of Douglas Lake, Henry Allan Gleason 
Car-window Notes on the Vegetation of the Upper Peninsula, R. M. Harper. . . . 
Permanent Vegetation Quadrats at Douglas Lake, AdaK. Dietz 
Role of Vegetation of a Mill Pond, F. A. Loew 
Key to the Species and Varieties of Solidago in Michigan, C. H. Otis 
An Easy Formula for Obtaining Alcohol of any Strength, Richard de Zeeuw. . . . 
Report on the Progress of the Biological Work of the Michigan Geological Survey 
during the year 1912-1913, Alexander G. Ruthven 
Check-list of Michigan Lepidoptera. II. Sphingidae (Hawk Moths), W. W. New- 
comb 
Results of the Shiras Expedition to Whitefish Point, Michigan, Reptiles and 
Amphibians, Crystal Thompson and Helen Thompson 
The Flowering Plants, Ferns and Their Allies of Mackinac Island, C. K. Dodge . 
Report of the Librarian for 1912-1913 
Index 
Page 
1 
3 
5 
7 
9 
15 
18 
20 
26 
26 
33 
39 
54 
59 
60 
64 
65 
71 
74 
80 
78 
87 
95 
104 
105 
106 
107 
114 
120 
121 
129 
130 
138 
142 
145 
150 
147 
193 
199 
201 
203 
209 
210 
213 
215 
218 
238 
251 
