9 
sees of is color. Soldiers had also used the place as a stable 
had di 
It is very well to have two sets, one to preserve and one to use. 
r. Wm. J. Gies, professor 7 Biological pce: at Columbia 
Ge. and consulting chemist at the Garden, has been con- 
sulted in this matter and he makes the following very pertinent 
ee 
umidity and light are the chief destructive agents or- 
t awa a 
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present, black lead sulfid being formed. Sulfur dioxid may be 
very injurious, since it is an active bleaching agent. 
. Naphthalene and pane which are much used in the 
fungous herbarium to keep ts, are not harmful to ce 
ings; but chloroform, ether, and similar markedly volatile fat 
solvents, should be carefully guards against. 
Funct Parntep By Mr. Epwarp C. VoLKERT 
In when the inauguration of Mycologia was being con- 
Baty : secured the active interest of Mr. Edward C. Volkert, 
a painter of some note who lived near me, and we together made 
of experiments in illustrating and reproducing illus- 
y fun 
t 
printing papers being discarded as useless and platinum paper 
