Following this is the bulk of the volume, containing brief descriptions of the birds, their nests, nesting places and eggs, and here the author has confessedly borrowed from Bendire, Davie and other well-known authorities, although one might wish that Mr. Dugmore had introduced more of his own observations, since those given incidentally in the first part are very interesting; where he indulges in theory he is less successful. In place of the usual method of studying the nest from the bird, we have that of studying the bird from the nest, and for this purpose the nests are grouped in classes, a chapter being devoted to each class; thus we have nests open, on the ground in open fields, marshes and generally open country; open nests in trees; nests in bridges, buildings, walls, etc. By this plan any one finding a nest can, with a little care and observation, identify the bird that made it. The illustrations, largely of nests and eggs, are a noteworthy feature of the book, although the three-color process which succeeded so admirably in Dr. Holland’s _Butterfly Book_, is here as equally distinct a failure, the least bad of the colored plates being that showing the nest of the yellow-breasted chat, the worst that of the nest of the Baltimore oriole. Those in black and white, however, merit the highest praise, and this includes the smaller cuts introduced as decorative features in the first portion of the book. It would seem difficult in a half-tone to improve on the plate of young crested flycatchers for clearness of detail, while among others that deserve special mention for artistic effect is the wood thrush on nest, and the nests of the chestnut-sided, yellow, blue-winged and worm-eating warblers. The general ‘get-up’ of the book is excellent, and the printing of the plates separately permits the use of a deadfaced paper for the text, which is pleasant to the eye. THE PROGRESS OF SCIENCE.