318 NOTES. 
but a manifest and permanent differentiation is claimed to oceut, : 
By an ingenious experiment, glycogen was detected in lympl- — 
cells. Their glycogenic properties are lost when lymph or white — 
blood-corpuscles become transformed into non-contractile pus- : 
corpuscles, which latter, by excess of oxygen, may undergo fatty — 
degeneration, or, by long immersion in water, other changes due n 
to the presence of oxygen. There also seems to be a close chei- 
ical relationship between pus-corpuscles and yeast-cells. of 
Exogens AND Enpocrens.— At a recent meeting of the Royal 
Microscopical Society, Prof. T. Dyer expressed himself satistied of 
an exogenous growth in Lepidodendron, notwithstanding its ert 
dently cryptogamic character. He considered De Candolle’s ters 
exogens and endogens to be already generally abandoned in favor 
of John Ray’s previous names Dicotyledons and Monocotyledons 
Recent researches, especially those of Mohl, had proved fist 
Monocotyledons were really not endogenous, but acrogenous; * 
He would like to see fossil and recent specimens nos í "i 
ied by the same systematists, but arranged side by side mi 
museums. as 
A Consrectus or tHe Draromacex.— This mature and 
valuable work by Prof. H. L. Smith, has begun to appea " 
Lens.” Diatomists will look with interest for the Suti 
numbers. 
PHOTO-MICROGRAPHS PopuLarizep.—It is w be hoped 
croscopists, and others interested in scientific zr ne ~ 
notice and appreciate the effort now being made, by S ann sjel 
of Newburyport, Mass., to supply ‘‘in a cheap an 
objects. Judging from the work already done, ee 
enterprise will prove both entertaining and msi" 
cultivated public. 
NOTES. 7 8 
San Francisco Meeting of the American Associati ed 
Advancement of Science. In our last number Wè 
the committee having the matter in charge had 
