: i. | = Ertentty intended to replace Gray's Lessons in botany, W® 
382 ; BOTANICAL GAZETTE [may 
making; and chapter 15 to the rédle of amylase in the distillery. Much 
attention is also devoted to methods of determining the activity of enzymes, 
to which Effront himself has contributed greatly, as indeed he has to the 
whole subject. 
Three enzymes are considered in great detail, namely, sucrase (invertase), 
amylase (diastase), and maltase. The most important industrial applications 
of maltase seem to be in the manufacture of various oriental beverages. 
In several inductory chapters the author discusses the general properties, : 
the mode of action, and the individuality of enzymes. For the general : 
reader or the physiologist these chapters will be found the most useful. The 
translator adheres to the author’s use of the term diastase in its general sense 
as a synonym of enzyme. In view of the very wide application of the word 
diastase to a particular group of enzymes this usage may lead to confusion. 
In general the translation is satisfactory, though the choice of words is not 
always happy, and the paragraphing might have been greatly improved upon. 
At the close of each chapter there is a bibliography. The incompleteness of ou 
the citations and the diverse forms used will be a source of annoyance to 
anyone attempting to look up references. The translator could have done 
good service to English readers by adopting some consistent plan of citation 
and supplementing the author’s bibliographical work. 
finish, all of which leave the eae without a cipawicet impression 
no doubt due in part to the incompleteness of the subject, for int 
"remains to be discovered regarding these bodies, but part of the result 
must be ascribed to the work of the author and translator. es oe 
The book, however, will be extremely useful to schools and indi a 
fos concerned. with the industrial processes of baking, malting, cna : 
a verte etc., in which fermentation plays so important a ae ae es ao 
Outlines of botany.* es 
oe Mr. Leavitt has prepared, at the request of the sides lep: i upon 
Harvard U niversty, a text-book of botany for secondary — ~ even in its 
ee . 4Leavirt, ROBERT GREENLEAF, Outlines of botany, for high-school 
and class room, based on Gray’s Lessons in botany. Prepared at 
_ botanical department of [Harvard University. 8vo. pp. 272+ AEs 383. OF den 
A poses Book — 1901. Also, combined with Pity ee ey 
