274 INDEX. 



Philadelphia vireo 15(5 



Phoebe, the 59 



Pine warbler, the 60, 151 



Plan of an aeriating machine for aquariums 214 



Prospectus 1 



Purple martin 110 



Questions and answers 56 



Red-eyed vireo 155 



Robin 31 



Rough -winged Swallow 115 



Sedimentary rocks 129 



Singular belief among the Bahama Creoles 21 



Silver comma 78 



Some Maine birds 256 



Some native birds 93 



Some October birds 197 



Sponges 116 



Sponge gathering 118 



Starfish 9, 11, 1-20, 124, 125 



Story of a pebble 47 



Swallows 128 



Swallows of Eastern North America 110 



Systematic Zoology for teachers 15, 48, 76, 102, 131, 170, 216, 221 



257 



Toads 123 



The story of a sponge 45 

 Three April birds 59 

 Trees in winter 22 



Vacation studies in geology 187 

 Vireos of New England, the 150 



Walks and talks by the seaside 139 



Warbling vireo 155 



White-bellied Nuthatch 7 



White-bellied swallows 61, 111 



White-eyed vireo 154 



Winter birds 3 



Winter Geology 18 



Wood frog 157 



Wreck of the Physalia, Portugese man-of-war 168 



Yellow-striped locust 20, 34 

 YeJ low- throated vireo 152 



