hidex. 



321 



PAGE 



Oak Pruners 167 



Obligation 267, 272 



Observation, necessity of 123 



Orchid flowers, special contrivance in 73 



Oriole 102 



Osmose, chemical action, and mechanical structure are but 



servants 88 



Ought 220 



Owl, as an illustration 117 



P. 



Partridge 121 



Philosophy, speculative 30 



Physiology and instinct work together 8g 



Plant, activities in the 26 



apparent forethought in the 59 



secret processes in 60 



often seems like a sentient being providing for 

 growth, enjoyment, rest. Examples— sensitive plant, 



sunflower, water-lily 60, 62 



sex among plants 63 



young provided for by the parent plant 63, 65 



as protector and supporter of animal life. Examples, 



oak, golden rod, potentilla, willow and spruce 66 



adaptation of means to ends. Example — tent-moth. . . 70 

 special contrivances in. Examples — orchid flowers. ... 73 

 change of action in, according to surrounding condition 

 or the change in it, example — woodbine, bean, potato 114 



Positivism 47 



Prayer 283 



Progress, in society, in knowledge of men, and in natural 



science 224, 29S-300 



Providence 253 



Protoplasm 77 



Psychological prism needed 215 



Ptarmigan grouse of Greenland 133 



Q- 



Question in this discussion to be " What is it ? " — not '' Hov.- 

 is it ? " 46 



