THE ARNOLD ARBORETUM 
HARVARD UNIVERSITY 
4 
Oakes Ames, A.M., Professor of Botany, Supervisor 
John George Jack, Assistant Professor of Dendrology 
Alfred Rehder, A.M., Curator of the Herbarium 
Joseph H. Faull, Ph.D., Professor of Forest Pathology 
Karl Sax, Ph.D., Associate Professor of Cytology 
Ernest J. Palmer, Collector and Assistant in the Herbarium 
ClarenceE. Kobuski, Ph.D., Assistant Curator , Herbarium 
Eva M. Fling Roush, Ph.D., Assistant in the. Herbarium 
Ethelyn Maria Tucker, Librarian 
Ethel Antoinette Anderson, Business Secretary 
Elizabeth Dean Bennett, A.B., Assistant Librarian 
Katherine Eleanor Kelley, Assistant in the Library 
Louis Victor Schmitt, Superintendent 
William Henry Judd, Propagator 
Jamaica Plain, Massachusetts, U.S.A. 
August 8, 193*. 
Ay de-r Mr. Jdwards; 
Just a word of warning regarding too 
much, pressure In pressing your orchid irate rial. Inlooking 
at x,r.:lia rubeseens and L. Digbyana, I think it it evident 
that these were unduely weighted. Although the specimens 
look well, it becomeevery difficult to restore them to any 
sort of fori- for study when they are boiled out because the 
parte are- agglutina ed. This is very true of such things as 
Sobralia and Vanilla. Sometimes it is well to use pads of 
cotton in paper to place over the flower® of such things as 
Cattleya and L&elia. In any case pressure may be a serious 
fault in tb absence of al/coholic material. Just avoid a 
crusting weight, and if the fleshy bulbs and leaves indicate 
the need of pressure» then protect the flowers with pads. 
Gometime6 one has to build up a sort of frame with strips of 
paper round a flower to protect it while sufficient pressure 
is imparted to thick leaves/ Your ingenuity will play an im¬ 
portant part in this regard. Just make sure that the sepals 
and petals <to not have the appearance of being glued together. 
Very truly yours. 
