228 
INDEX. 
Page. 
Potass-ferro-eyanide, Capillarity of 55 
Praeger, William E., Vice-President, Section of Botany 13 
Pre-glacial erosion 25 
Presidential address, M. S. W. Jefferson 23 
Problem of the causes of the formation of mechanical tissue in plants 42 
Puffballs, etc., of Michigan 73 
Purpose of the secondary school 153 
Put in bay cliffs 24 
R. 
Rahn, Otto, Bacteriological studies of dry and moist soils 20, 211 
Rain in West Norway 27 
Ranunculus Purshii, Seedlings of 39 
Reighard, Jacob, Past-President 13 
Parental care of Michigan fishes 20 
Additional experiments on the color vision in fishes 211 
A reflecting water-glass 22 
A method of sub-aquatic photography 22, 211 
Rocks in Norse landscape 24 
Roofs in Norway 28 
Rouse, F. P., A course in practical pathology 21 
Rowland, B. S., Present scope of the national Red Cross 21 
Ruthven, Alexander G., The faunal affinities of the prairie region of Central 
North America 211 
S. 
Saginaw County, Pleistocene Beaches of 90 
Sayer, William S., Acting Secretary-Treasurer 13 
The development of certain milk bacteria at a low temperature 21 1 
Sclerotia 50 
Sclerotinia fructigena, winter stage of 51 
Seamanship of English 24 
Seamen in Norway 24 
Sea path 23 
Secondary schools, biology in 145, 153 
Secondary school, purpose of 153 
Secotium acuminatum, Mont., development of 72 
Seedlings of Ranunculus Purshii 39 
Seland, R. Genung, Syphilis of the placenta 21 
Sherzer, W. H., Past-President 13 
Note on the Intercolated Devonian bed, etc 21 
The nature, distribution and origin of the Sylvania Sandstone. . . 21 
Shumway, Frank W., Sanitation as a business proposition 21 
Soil, Bacteriological studies of, dry and moist 211 
Soil problems, toxicity a factor in 209 
Some interesting variations of common plants 37 
Spaulding, V. M., Past-President 13 
Spores of fungi, toxic action of Bordeaux mixture 58 
Spores, Solutions toxic to 58 
Stearns, Miss Frances 38 
Sulphuric acid, capillarity of 56 
Superior, ice lobe 91 
T. 
Table of contents 5 
Tendrils, Response of, to contact and tension 44 
Tension, influence of, in formation of mechanical tissue 43 
Thunder Bay Island, A botanical trip to 40 
Tides in Northfiord 28 
Tinker, A. I)., The bird life of School Girls Glen 22 
Toxic action on spores 58 
Toxicity, a factor in soil problems 209 
Treasurer, Report of 18 
