326 
POPULAR SCIENCE REVIEW. 
the forty-eight hours’ immersion, I placed the two leaves in water and they 
partially re-expanded. I thought that the whitened glands were perhaps- 
killed ; but those of one leaf which. I tried with carbonate of ammonia 
absorbed it, and the protoplasm was affected in the usual manner. I am 
very much surprised at the action of the poison on the viscid secretion from 
the glands, which it coagulates into threads and bits of membrane, with 
much granular matter. Have you observed whether the poison affects in 
any marked manner mucus or other such secretions ?” 
Microscopical Papers. — The following papers have been published in the 
“ Monthly Microscopical Journal ” for April, May, and June last : — 
Some Remarks on Bucephalus Polymorphus, by Mr. John Badcock, 
F.R.M.S.; together with Translations from Papers of Yon Baer, 
Lacaze-Duthiers, and Alf. Giard, on B. Polymorphus and Haimeanus, 
by Henry J. Slack, F.G.S., Sec. R.M.S. — On the Principle of testing 
Object-glasses by Miniatures of Illuminated Objects examined under 
the Microscope, especially of Sun-lit Mercurial Globules $ and on the 
Development of Eidola or False Images. By Dr. Rovston-Pigott, 
M.A., F.R.S., F.R.A.S., F.O.P.S., formerly Fellow of St. Peter’s Col- 
lege, Cambridge. — On a Method of obtaining Oblique Vision of Surface 
Structure, under the Highest Powers of the Microscope. By F. H. 
Wenham. — On the Connection between Fluorescence and Absorption. 
By H. C. Sorbv, F.R.S., &c., President R.M.S. — Further Researches 
into the Life History of the Monads. By ~W. H. Dallinger, F.R.M.S., 
and J. Drysdale, M.D., F.R.M.S. — On New and Improved Microscope 
Spectrum Apparatus, and on its Application to various Branches of 
Research. By H. C. Sorby, F.R.S., &c., Pres. R.M.S. — Some Remarks 
upon Sphseria (Gibbera) morbosa (Schw.). By Charles B. Plowright. — 
The Amoeban, Actinophryan, and Dililugian Rhizopods. By G. • C. 
Wallich, M.D., F.L.S., &c — Note on the Diagnosis of Blood Stains. 
By Jos. G. Richardson, M.D., Microscopist to the Pennsylvania Hospital, 
Philadelphia, U.S.A. — On Bog Mosses. By R. Braithwaite, M.D., 
F.L.S. — On Angle of Aperture in Relation to Surface Markings and 
Accurate Vision. By Henry James Slack, F.G.S., Sec. R.M.S. — 
Measurements of the Moller Probe-Platte. By J. Edwards Smith, Esq., 
Ashtabula, 0., U.S.A. 
PHYSICS. 
An American View of Young . — A paper appears in u Silliman’s American 
Journal” (April 1875), which gives Mr. A. M. Mayer’s view of Young’s- 
abilities. Mr. Mayer, who is a distinguished physicist, in reviewing Young’s 
theory of light, says : u That he should have delayed to bring to the test of 
experiment a plausible hypothesis, when other men would at once have 
appealed to the instruments in their laboratories, is explained by the fact 
that Young 1 at no period of his life was fond of repeating experiments or 
even of originating new ones. He considered that, however necessary to< 
the advancement of science, they demanded a great sacrifice of time ; and 
that, when a fact was once established, that time was better employed in 
