INDEX. 203 



Page. 



Oosporia 62 



Ophidia IG, 111 



Ophiobolus 66 



Origin of Hydrogen sulphide 27, 28, 29 



Origin of Sulphur , 26, 27, 28, 29 



Oxygen, color effect upon 45 



Pans 14. 



Papers presented 14 



Paramecia, Some results of a study of variation in 77 



Parai 63 



Paramaecium ; 16, 77 



Parietal Scuta 90 



Pearl, R. and Dunbar, F. J., on some results of a study of Variations in Para- 

 mecia 16, 77 



Peat 14 



" Growth of 21 



Pedicellariae 16 



Peet, M. M 16 



Penicillium 62 



Percentages of Normality 101 



Pettee, Edith E 15, 126 



Pettee, William Henry 12 



Pezizineae 65 



Pfeffer 44 



Phelps, Jessie 15 



Phialia 65 



Phleospora 58 



Photosyntheses, effect of color upon 45 



Phototaxis 16 



Phototropisim, color relation 44, 



Phyllaetinia 66 



Phyllosticta 58, 59 



Physa 16, 84 



Physiography 15 



Pine, Forests 20, 24, 25 



Plants. 15, 68 



Distribution of 16, 73 



Distribution in small bog 126 



Plant Food 14 



Plectascineae 65 



Pleonectria 66 



Pleospona 66 



Pleurotus 64 



Plowrightia 66 



Pneumoccus 15 



Podosphaera 66 



Podosporium 62 



Poison, Intra Cellular 15 



Intra Cellular, Extraction of 15 



Pollock, Jas. B 53, 55, 56, 57 



Polygyra, Distribution of in Michigan 16, 92 



Polyporaceae 57, 63 



Polyporus ^ 53, 63 



Polythrincium ' 62 



Porcupine Mountains 16 



Birds of 16 



Mollusks of 16 



Post-Glacial 14 



Potassium Permanganate, disinfection by 15, 177 



President of Mich. Acad, of Science 9 



Problems in Agriculture 150 



Protantheae 75 



Protodiscineae 66 



Pseudovalsa 66 



Psilocyhe 64 



