186 
INDEX. 
Page 
Carbonic acid gas . 102-103 
Cellulose, production of . 40 
Chemically pure water . 129 
Chimney swift in Canada in winter. 14 
winter quarters unknown . 16 
City supplies, general . 99 
Constitution of Michigan Academy of Science. 1 
Contamination of underground waters . 103-104 
Council of Michigan Academy of Science . 5 
Correction of incomplete series of rain observations. 80 
Crenothrix . 102 
Crow, migration of .. 15-16 
Crow-roosts . 15 
Dan,deno, J. B., paper by .40,45,48 
Data of Great Lakes rainfall. 83-91 
Detroit Mycological Club . 26 
Didymaria perforans . 45 
Disease, prevention of . 141 
Ducks, velocity of flight of . 21 
Ecology of birds .151,157,162 
Editor of Michigan Academy of Science .. 5 
Errors, botanical, found in text-books . 64 
Errors of rain estimates . 82 
Escanaba water supply . 101 
Pact and fancy in bird migration . 13-25 
Fertilizers, relation to nodules on legumes.,. 71 
Fischer, E. 0. 26 
Fish of Hillsdale county, Michigan . 175 
Filter beds .118,121,122,126 
Fire protection ... 105,127 
Flagellum, staining of, in spirochaeta obermeiri . 145 
Fletcher, S. W. 10 
Plight of birds at great, heights .. 19-22 
rapidity of . 19-21 
Forest succession and bird succession . 157 
Forest relation to birds . 157 
Fox sparrows destroyed by blizzard . 23-24 
Frothingham, E. H., paper by. 157 
Fungi, unreported Michigan, from Petoskey, Detroit and Ann Arbor. 26 
Gatka, H., on migration at Heligoland . 19-20 
Geese, velocity of flight of. 21 
Geological conditions of Michigan water supplies. 99-110 
Germ-free water . 129 
Gladstone water supply . 101 
Glutin, crude, in relation to the bread-making value of wheat and flours.. 75 
Golden plover, migration of .21,22,24,25 
Goldthwait, James W., paper by. 98 
Great Lakes rainfall unreduced . 81 
Great Lakes water supply ... 99 
Greenhouse lettuce, disease of . 45 
Hankinson, T. L., paper by . 175 
Hardness of surface waters . 99-100 
underground waters . 102,129 
Hawks, migration of . 25 
Hayward, E. H., paper by . 141 
Heligoland, reference to birds of .. 19,20 
Hibernation of swallows and swifts . 14 
