88 
Review, 
adopted by Professor Sachs in his paper, ‘ Ueber orthotrope und 
plagiotrope Pflanzentheile/ and is now likely to become generally 
known and accepted. 
In other points too the ‘ Lectures ’ contain expositions of the 
author’s latest views, and in this way the translation does good 
service in bringing befofe English readers the interesting work which 
Professor Sachs has published in recent years. These re-statements 
of his results are full of interest even to those already acquainted 
with the original papers. But for the less instructed circle to whom 
the author, at least in part, addresses himself, we doubt whether 
this kind of mental food is nourishing, or indeed digestible. What 
can we expect such a reader to make of the discussion (p. 494) on 
the ideal construction of a dorsiventral organ out of a number of 
radial elements placed side by side ? Or of a conception of a radial 
organ being formed of a dorsiventral one rolled into a cylinder ? 
In making these criticisms, we are far from wishing to imply that 
the book as a whole is not well adapted to the class for which it 
is intended. The points to which we have alluded as being likely 
to prove unfruitful for the less instructed, take up but a small space, 
and so far as our own individual taste is concerned we should regret 
their absence. It is as a whole that the book should be judged, and 
looking at it in this light we feel certain that it will do good service 
in guiding its readers to just conceptions of the subject. 
