876 NOTICES OF BOOKS. 
Lectures on the Physiology of Plants. By Jutrvs von Sacus. Trans- 
by H. HALL Warp, M.A.,F.L.S. Oxford, Clarendon 
Press, 1887. 8vo, pp. xiv. 836. 
systematic portion as a separate book, ‘ Grundziige,’ &¢. (which 
form as ‘ Outlines of Classification and Special 
d 
organs, ‘‘root an a 
considerations doubtless has its conveniences from the purely 
physiological point of view; but it can hardly be said to be judicious 
in a scheme of general botanical instruction, and the root and shoot 
system will probably do more harm than good in the long run. 
Part II. is devoted to the external conditions of vegetable-life and 
the properties of plants; Part IIT. to nutrition, and Part IV. to 
growth; while irritability and reproduction are respectively dealt 
with in V. and No more excellent, exhaustive, and thoroughly 
well and clearly-written treatise on plant physiology is to be found 
in any language, naturally excepting the author’s own origi 
German book, though this is no disparagement of Prof. Ward’s 
A Manual of Orchidaceous Plants cultivated under glass in Great 
Britain. Part I. Odontoglossum. . 80. James Veitch & 
Sons, 544, King’s Road, Chelsea. 1887. 8vo, pp. 80 [Price 
not stated]. 
