342 The Botanical Gazette. —— FAugust, 
done. The experiments are well selected, and not difficult to per- 
form. A few are by no means likely to afford the degree of success 
that the description of the process would indicate; but this comes 
from inherent difficulties, and to give all necessary precautions would 
be likely to frighten the beginner from any attempt, which would be 
worse than to try with but partial success Some of the experiments 
call for considerable knowledge of manipulation on the part of the 
instructor. However, it would be difficult to select a more satisfac- 
tory series of experiments on the whole, to illustrate the main facts of 
the science. Moreover, it is not necessary to use the whole series in 
order to present an acceptable outline, and selections can be made to 
meet special requirements. . 
The apparatus required is of the simplest kind, and is not difficult 
or expensive to provide.. 
The majority of the experiments are of the qualitative type, and all, 
even the quantitative ones, are specially designed for beginners, no 
attempt being made to indicate the precautions or niceties of manip 
lation required for strictly accurate and authoritative work. + 
The last chapter, a short one of a page and half, on the relation of 
plants and animals, does not properly belong to the subject of phys 
ology, but to that of ecology, and its omission would be preferable. : 
The translator has added a page of equivalents of English and 
metric weights and measures, and an index to the plants mentioned 
in the text, for which all students will be grateful. 
The printers have done fair work ; some minor defects may be sal 
- looked as due to inexperience in book-making. The paper and b - 
ing, the latter flexible cloth, are well suited to a laboratory manl 
Minor Notices. 
Durinc the summer of 1893 the Michigan Fish Commission Fen 
party to study the flora and fauna of Lake St. Clair. Mr. A.J. isi 
was botanist of the party, and he has now published ¥ The plan “ik 
Lake St. Clair” as one of the bulletins of the Commission. The pe 
is based upon that of Magnin in the lakes of the Jura. per : 
was found arranged in zones limited by the depth of water, ee 
ing certain plants characteristic of each zone, although Magnins ©” — : 
pharetum did not exist. 
ntof 
Dr. Wittiam TRELEASE has published an interesting ae @ 
Leitneria Floridana, distributed in advance of the sixth annua this: 
of the Missouri Botanical Garden. Mr. B. F. Bush discov ts being 
species in 1892 in the lowlands of S. E. Missouri, the ee Gulf 
more robust than those of Florida, and associate with 0! 
