468 BOTANICAL GAZETTE [JUNE 
Doubtful and perplexing examples of Protista and spermatozoa are pre- 
sented, while such clear and striking examples as are afforded by the experi- 
ments of Dr. Loeb on the moth Amphipyra are not mentioned. The same 
objection holds with still greater force in regard to the chapter on geotaxis. 
Another thing which we regret is that in a text-book of biology, which 
evidently bases all biological phenomena upon the chemistry and physics of 
the organism and its environment, such metaphysical terms as photophil, 
photophob, lovers of dark, etc., are used. The same applies to the terms so 
frequently used, ‘adaptation,’ ‘advantageous to the organism.” If by 
adaptation is meant no more than if we were to say that the photographic 
plate is adapted to the action of the light, the term is misleading. If, how- 
ever, by such terms more is understood, it brings physiology back to the 
realm of metaphysics, a result contrary to the general tendency of the book. 
We are glad the author, even at the risk of becoming wearisome to the 
ordinary reader, goes quite extensively into the physics and chemistry of 
such subjects as light and solutions. The fuller description of methods will 
certainly be highly appreciated by the student. Indeed, seeing how much in 
biological investigation depends upon methods, we could almost wish the 
author had been still more elaborate in this respec 
In general, the subject matter is well specie’: Relatively much space 
is given to the facts and little to conflicting theories. The style is clear and 
concise. The bibliography will be of great use to the investigating student. 
The spirit of the first part is such that we shall look with impatience for the 
other three parts on growth, cell-division, and differentiation. The author 
__ has certainly done a great service to the student of biology in the careful col- 
oo - lecting of the numerous researches in the field of experimental morphology, 
_. and we doubt not that the book will prove of immense value as a text, an 
a asa stimulus to further and more thorough investigation —_W. D. ZOETHOUT. 
Sa under glass. 
ue of the “Gardencraft Series”? deals with the forcing of 
et hi ig ; precisely what its subtitle indicates: a manual of the cul- 
ons growing of each. These instructions are 
ally p worked | out by 1 the author and others. While the author 
beg inners to. 
Ls 
— New tui have 
etables in glass houses. It gives explicit directions for the — 
ct and management of forcing houses, enumerates the vegetables _ 
only grown or capable of being grown in such houses, and gives 
n A pinsbecniga a roca ait great possi- . 
undertake 
in 7 ae the valtiewioe ort hegre in es 
. 
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