1888. | BOTANICAL GAZETTE. 6r 
? 
OFFICE OF THIRD ASSISTANT PoOSTtMASTER-GENERAL, 
ST-OFFICE DEPARTMENT 
WASHINGTON, D. C., February 11, 1888. 
Editors Botanical Gazette : 
Your letter of the 4th inst., addressed to the postmaster-gen- 
Strs— 
eral, has been referred to this office. 
nder the recent act of congress in relation to permissible printing 
and writing upon second, third and fourth-class matter, there may be 
The labels you submit, and which are herewith returned, are there- 
fore permissible. [These labels are of the usual form, giving the above 
data.— Eps. ; 
mulgated, it is not unlikely that specimens sent by mail with such written 
descriptions will be subjected by postmasters occasionally to delay, and it 
may be to improper exactions of postage vent this as muc 
Yours, very respectfully, . H. R. Harris, 
Third Assistant Postmaster General. 
Further notes on imbedding.—In the July number of the BoTanica 
GazErre for 1887, p. 172, the editors noticed a method for imbedding 
delicate plant tissues which I described in the But. Centralblatt. Since the : 
publication I have had opportunity of gaining more experience in the use 
of this method, leading me to modify it slightly. In the first place, Inow 
use absolute alcohol, where I formerly only used the strong methylated 
spirit of commerce. Further, I now leave specimens to be imbedded for 
twenty-four hours in pure oil of cloves (after they have sunk), twenty- 
four hours in pure turpentine, twenty-four hours in turpentine saturated 
with paraffine, and twenty-four hours in melted paraffine. Although 
much more time is thus required, the resulis are more reliable, and I can 
now imbed, by my method, without previous staining in borax-carmine, 
and thus considerable time and trouble is saved. ak 
i 
‘plasm will be brought out.—SELMAR SCHONLAND, Botanic Garden, Oxford. 
anprebare the sol i i : Saturate 1 part of 
f k n in the following way 
BRD cruel 2, oameee ay gees feet tt iso tal ey 
‘and there 28 d dlogists, does no ell ¥ 
to kee, and the polities te were Gee wor been heretofore used by botanists is said not 
- Weep 'very wel), 
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