(279) 
corporated in the general collection. All current exsiccatae 
of mosses, many specimens from the Mitten moss herbarium, 
and various other collections have enriched the large moss 
herbarium. Ferns from tropical America were added to 
the fern herbarium. Flowering plants were added from all 
parts of the world, but particularly from North and South 
America. 
Cotumsia University Hersarium. Miscellaneous speci- 
mens of flowerless and flowering plants presented to Colum- 
bia University, together with some specimens from the 
Morong herbarium, were mounted and distributed into 
the collection. Some duplicate specimens of rare species 
mounted for the Garden herbarium were also incorporated 
in the Columbia herbarium in order to facilitate the studies 
in certain groups. 
MountTinG anp ConsERVING oF HERBARIUM SPECIMENS. 
A special attempt to mount and incorporate the accumula- 
tion of herbarium specimens yielded good results. Most of 
the American specimens, together with such foreign speci- 
mens as are of immediate use in current investigations, were 
mounted and distributed in the herbarium cases. 
A total of 33,000 sheets of mounting paper was used. This 
represents an aggregate of about 49,000 specimens added to 
the permanent collections. In addition, several thousand 
specimens too bulky to mount on herbarium sheets were 
preserved in carboard boxes. The cardboard box equip- 
ment was augmented by the following supply: 
Sizes of Boxes Number 
4 X234x 5% inches 2,000 
4 X284x11)4 inches 1,000 
544X4 2% inches 1,000 
8 514X244 inches 500 
Total........ 4,500 
Investigations and Assistance 
Mr. Percy Wilson, Assistant Curator, had charge of the 
public lectures on Saturday afternoons between April and 
