CURRENT LITERATURE 367 
demonstrated. There are granules in Chromatium and in Beggiatoa which 
sain red with haematoxylin, but they cannot be called chromatin on such 
eidence. There are no genuine nuclei in the sulfur bacteria. 
In dealing with the genuine bacteria, the theory that«bacteria are nuclei 
vithout cytoplasm is regarded as unfounded. After the best fixing agents 
either Spirillum nor other bacteria show clear, less deeply staining ends. 
biitschli’s central body is nothing but the entire protoplast contracted by the 
pasmolysis of preparation. The contents of the bacterium cell consist of a 
lining of protoplasm along the wall and a central cavity which in elongated 
ms is chambered by protoplasmic septa. Present methods fail to dem- 
mstrate a nucleus. The more deeply staining granules are not nuclei, or 
tromatin granules. The relationship of the sulfur bacteria and all other 
bacteria to the Cyanophycez is merely one of loose, superficial morphology. 
They stand in closer relation to the Flagellatae. 
Microtome sections from paraffine material were stained i 
‘proved manner, and the technique throughout was thoroughly up to date. 
The plates are exceptionally elegant, aud doubtless show what there is to be 
Sen.—Cuas. J. CHAMBERLAIN. 
n the most 
A laboratory manual.’ 
“a isthe name given to a little book by Principal Charles H. Clark, of 
_ Hall School. It seems to be the author’s idea to furnish a large 
* Suggestive material, from which work may be obtained either for 
: a or more advanced courses; and he follows, as he states, “the 
we sgested in the Report of the Committee of Ten.” As the reviewer 
#epared the botanical part of that report, it was a matter of interest to him, 
” Surprise, to see it take this expression. It has never fallen to ips 
Bt its 80 puzzled by a schoolbook dealing with botany. - It is a puzzle t 
| botany and as to its pedagogy. It claims to be adapted for use in 
hike? Courses, but there is no adequate explanation of the terms used or 
terminology is utterly 
: tie 
3 ] thread whatsoever 
—MOphytes, wh 
fn » where the morphologically important structures 
“Sate entirely dropped, and the work is confined to the histology of the 
“LARK, CHAR : ctical botany. Small 8vo. 
LES H.—A laboratory manual in practice Book Company. 96 
cts, &. 197. New York, Cincinnati, Chicago: American 
