555 Commonwealth Avenue, Boston, Mass* 
January 24th, 1922. 
My dear Dr. Powell: 
Your letter of the thirteenth January arrived 
this morning. It is surely good news to know that additional spec¬ 
imens of your valued collection are on the way. Ihen they reach me 
I will acknowledge them promptly. 
This morning I sent off to you a box of mount¬ 
ing paper, some felt driers, news-paper folders in which to lay out 
specimens between the driess, and some corrugated boards to place 
among drying specimens. These boards aot as ventilators and we 
find that specimens dry much better when they are used. The news¬ 
paper folders w© find simplify the transference of drying speci¬ 
mens. 17 e arrange the specimens in the folders anu do not touch them 
again until the material is dry. This method protects the speci¬ 
mens as they do not have to be handled each time a shift is made 
from wet to dry driers. In amothar package I mailed to you this 
morning a tube of the surgeon’s plaster that we U3e in attaching 
specimens tc the sheets. In the same package I enclosed some pock¬ 
ets of different sizes. In mounting specimens it is best to run 
the strips across the leaves. If simply anchored by the margins 
they are very apt to com© up or get damaged. With your permission 
I will replace the plaster you used with the material that is now, 
standard here, furthermore, I will keep you supplied with any 
' : iff 
amount you want. /\U 
I am keeping your collection together as a spec¬ 
ial set. Later I will have a special case made to hold it. I knew 
that this plan will meet with your approval and some day 1 hope it 
will be possible to show you the results. ' JA \ 
i: I f\ , 
I am sending you a couple of mailing tubes that 
