440 
POPULAR SCIENCE REVIEW. 
Society. — Observations on the Eecent Investigations into the Sup- 
posed Cholera Fungus. By the Eev. M. J. Berkeley, M.A., F.L.S, 
On the Correlation of Microscopic Physiology and Microscopic Physics. 
By John Browning, F.E.A.S. — Notes on Hydatina Senta. By C. T. 
Hudson, LL.D. — Some Eemarks on the Structure of Diatoms and 
Podura Scales. By F. H. Wenham. — Structure of the Adult Human 
Vitreous Humour. By David Smith, M.D., M.E.C.S. On the Use of 
the Chloride of Gold in Microscopy. By Thomas Dwight, Jun., M.D. 
— On a Simple Form of Micro-Spectroscope. By John Browning, 
F.E.A.S. On the Structui-e and Affinities of some Exogenous Stems 
from the Coal-measures. By Professor Williamson. — On the Battle- 
dore Scales of Butterflies. By John Watson, Esq. — Postscript to Eev. 
J. B. Eeade’s Paper on his Prism Structure of the Podura Scale. — On 
Methods of Microscopical Eesearch. By Herr Strieker. — On the Con- 
struction of Object-Glasses for the Microscope. By F. H. Wenham. — 
Jottings from the Note Book of a Student of Heterogeny. By Met- 
calfe Johnson, M.E.C.S. — Supposed Mammalian Tooth. By T. P. 
Barkas, F.G.S.— On Holtenia, a Genus of Vitreous Sponges. By 
Wyville Thomson, LL.D., F.E.S. — Micro-Spectroscopy, Eesults of 
Spectrum Analysis. By Jabez Hogg, F.L.S. — Floscularia Coronetta, a 
New Species, with Observations on some Points in the Economy of the 
Genus. By Charles Cubitt, Assoc. Inst. C.E., &c. — On the Detection 
by the Microscope of Eed and White Corpuscles in Blood-stains. By 
Joseph G. Eichardson, M.D. — Observations on Mucor Mucedo. By E. 
L. Maddox, M.D. — On the Staining of Microscopical Preparations. By 
Dr. W. E. M‘Nab.— Some further Eemarks on an Illumination for 
Verifying the Structure of Diatoms and other Minute Objects. (Almost 
all these papers are illustrated. Vide Monthly Microscopical Journal.') 
PHOTOGEAPHY. 
Owing to the pressure on our space, occasioned by the great length of 
some of our original articles and of the table of contents and index to the 
volume, the photographic summary is imavoidably crushed out ” of this 
number. 
PHYSICS. 
The Spectroscopic Examination of Small Stars. — In the Coynptes-Rendus 
of July 10, a letter is published from Padre Secchi, in which he states that 
he has succeeded in studying the spectra of stars which are only of the 
8th and 0th magnitude. The light emitted by such stars being very feeble, 
it is gratifying to learn that observation has proved that, among the spectral 
lines, those of carbon occur, and that the spectra, as seen, appear to prove a 
common origin for these small stars which are, comparatively, situated near 
to each other. — Chemical Nexes. 
