THE MIcROSCOPE. 285 
avoided by putting under the cover a frond or two of Lemna ; 
this arrangement has the advantage that by a push at the edge 
of the cover the Cyclops can be rolled over. The Abbe condenser 
was found invaluable. For dissection French spear-head needles 
were used ; the parts are best seen in water after treatment of the 
fresh animal with ammonia. 
NEW PUBLICATIONS. 
SURGICAL BACTERIOLOGY.— By Nicholas Senn, M. D., Ph. D. 
Cloth, pp. 17, 270. Lea Brothers & Co., Philadelphia. This 
work is one of the most extensive on the subject which has 
originated in this country. Dr. Senn has long been known as 
one of the foremost of American investigators in surgery, and 
this latest result of his efforts should receive a careful reading, not 
only from surgeons, to whom it is more especially addressed, but 
by physicians as well. ‘Fhe writer, like nearly all the advanced 
workers in pathology of the present day, is a firm believer in 
the bacterial origin of many if not all of the infectious diseases ; 
and yet he is one, of whom there are too few, who possesses that 
healthy conservatism so necessary to check the over-exuberant 
growth of a newly-developed field. This volume is intended as 
a record of reliable results obtained at the present time, and 
when there is still some doubt, however slight, the fact is men- 
tioned. The work is superbly illustrated with reproductions 
from Klebs’ Lehrbuch des Pathologischen Anatomie, and is in every 
way worthy of the publishers. 
How to Conpuct a Quiz CLuass—By H. M. Whelpley, Ph. G.,. 
F. R. M.S. Reprint. 
ON THE GuSTATORY ORGANS OF ARcTOMys Monax.—By Fred- 
erick Tuckerman. Reprint. 
CONSTITUTION AND By-Laws oF THE St. Louts CLup or Micro- 
scopists.—Organized May 7, 1887. 
PROSPECTUS OF THE St. Louris COLLEGE oF PHARMACY.—Twenty- 
fourth annual session, from October, 1889, to March, 1890. 
On A Fosstn MARINE DiatToMAcEous DEposIT FROM ATLANTIC 
Crry, N. J., 1., 11.—By C. Henry Kain and E. A. Schultze. Re- 
print. 
