52 ; QUARTERLY CHRONICLE. 
“On some Ameebe living in the Earth, and other Rhizo- 
pods” (two plates), by Dr. Richard Greef. 
‘“ Bony Bodies with Special Capsules in the Tooth-pulp”’ 
(with figures), by Dr. Hohl. 
“ On the Contractile Tunic of Infusoria,’ by Dr. Schwalbe. 
“ On the Influence of Gases on Ciliary Movement,” by Herr 
Kuhne. 
FRANCE,.—Comptes Rendus.— “ The Microscope and Gas- 
diffusion.” —Mr. Graham, the Master of the Mint, communi- 
cated an account of his researches on the dialysis of gases 
to the French Academy a short time since. His latest ex- 
periments were made relative to the passage of gases through 
thin membranes of india rubber; and believing the india- 
rubber sheeting to be perfectly imperforate, he concluded that 
the passage of the gas was effected by a chemical union with 
the hydrocarbons of the india rubber. M. Flourens, how- 
ever, of the French Academy, has examined thin india rubber 
with the microscope, and declares that innumerable minute per- 
forations are to be traced in it, through which the gas would 
pass by capillary transpiration. It is certainly desirable that 
further examination of the matter should be made; mean- 
while microscopists may congratulate themselves upon a new 
field for their instrument. 
Robin’s Journal de l’Anatomie et de la Physiologie, No.6. 
November and December.—This journal appears to be con- 
ducted in somewhat the same manner as our own, since it 
publishes the transactions of the Micrographic Society of 
Paris in addition to other original memoirs and short notes or 
reviews. The first paper in the current number (the journal 
appears six times in the year) is on— 
“* Anatomical Lesions of the Enamel and Dentine,” by 
M. E. Magitot.—In this paper the microscopic structure of 
the teeth in caries is very fully figured and described, and 
the pathological and physiological bearings of the disease 
discussed. 
“« On the Lymphatic Vessels, &c.—Additional Note,” by Dr. 
Belaieff.—This is a continuation of the paper which we 
noticed in our last Chronicle. 
“ Researches on the Corpuscles of the Pébrine,’ by Dr. 
Balbiani.—The author was one of those appointed to investi- 
gate the disease of the silkworms for the French Academy. 
Certain corpuscles had been noticed as always present in 
great numbers in the fluids of the diseased worms, and had 
been variously described. Dr. Balbiani has examined them, 
and believes them to be Psorosperms—pseudo-navicule of 
some Gregarina. He regards them as vegetable parasite 
