225 
Fraxinus pennsylvanica var. lanceolata. GRrEN ASH. 
Location: Arboretum. 
Fraxinus profunda. PuspxKin AsH. 
Location: Arboretum. 
Natural distribution: South Central United States. 
Fraxinus quadrangulata. BLur Asn. 
Location: Arboretum. Near fountain at foot of Museum 
approach. 
Natural distribution: Eastern United States. 
Fraxinus rotundifolia. ROoUND-LEAVED ASH. 
Location: Fruticetum. 
Natural distribution: Southern Europe and western Asia. 
Fraxinus texana. TEXAN ASH. 
Location: Along road from Museum to South Gate. 
Natura! distribution: Texas. 
NOTES, NEWS AND COMMENT. 
There has recently been installed in the economic museum at 
the Garden an educational exhibit of ivory-pyralin, presented 
by the E. I. DuPont de Nemours Company of Wilmington, 
Delaware. Pyralin is the trade name of a substance very similar 
to celluloid and is purely a plant product. The basic substance 
in its manufacture is cotton, the cellulose of which is dissolved 
in acid, mixed with camphor, which is also a plant product, 
and made into a dough-like substance which can be molded into 
almost any form. Pyralin is used in the manufacture of combs, 
brushes, mirror backs, and other household utensils too numerous 
to mention. The white form is a close imitation of ivory, and 
with the use of proper pigments a form is made to represent 
tortoise shell. Transparencies are also made, such as those 
used in the curtains of automobiles. 
Dr. Florence A. McCormick, of the Connecticut Agricultural 
Experiment Station, recently spent a day in the library studying 
the literature of the white pine blister rust. 
