124 BOTANICAL GAZETTE. __ [May, 
of taking into account the modes of grouping in order to be able to distinguish 
between such minute objects, he says that “in the phenomen a of grouping 
there appear specific characters which must, rev ed, tas presen at i in the single 
roa but with the means at our command can not ber recognized or only with 
a ulty, yet, as it were, become Co in larger masses. This is, how- 
at nothing peculi ar. Pes cells, which in comparison with bacteria. are 
m n ‘ 
Io their ition or grouping, howe the one always goes to 
build nia the ‘lip nee yee the other the lily, “ak y ori we know that they 
are 
iobab ne of the most non corer parts of the Lage) a the general reader 
= — at “hapten, w eiey Ee ith the pro and con of the existence of spe- 
nities and position re hee stem 
i 
i} 
we 
s 
well a 
simple kinds. With some practi e can name them oes snaie piece te 
sociated from _ sevelopmn ental Sulameatlitts sil orse chestnut may, é be 
determined from d leaf. Other kinds of plants are pleomorphic 
s r 
the no question regarding true species among bacteria for 
150 years after their discovery; the controversy was introduced by Cohn whe 
he published his memorable classification of growth forms. 
So we mig ntinue to gi e author’s views regarding these form- 
species, the erro ich have arisen by inattention to details of manipulatio 
in performing cultures, even bys noted investig as Niigeli and Buch- 
ner, and the sys ic affinities and peculiarities of the bacteria. These and 
many other Boi a will prove of great interest to the biologi 
tL iewl Bey ahem the occurrence and distribution of mopar eT _ 
wth, relations to the substratum, parasites and s 
pte, important ex scipted of the latter described, the phenomena of parasitism, 
armless parasitic kinds in warm-blooded a nimals, relation of t 
tious diseases of animals and plants, which takes us to the end of the fourteenth 
chapter. A bibliography of important works and a name register closes the 
_ volume. — 
The importance of a work like this is not easily pawns d. It may 
not Siot, out many new facts, but it places those which a _ eady known in 
their true light, and makes clear the real position of the maha 
The Methods of Bacteriological Investigation. By Dr. Ferdinand pes Trans- 
lated by Hermann M. Biggs, M. D. New York: Appleton & Co., 1886. 
8°. pp. 218. 31 woodcuts. 
Die Methoden der Bakterien-Forschung. Von Dr. Ferdinand Hueppe. 3d_ ed. 
bles = yg C. W. Kreidel, 1886. 8°. pp. 244. 2 colored plates and 40 
this ack by Dr. Hueppe was written * the request of Dr. Koch, the 
most renowned of bacteriologists, w mparts a guarantee of value o 
the . dt does not, —* stand in apeci ial need of a tea for 
Most casu Me Superior to a way I fb st en A 
