(25) 
PropacatTinc Houses anp Nurseries. There are here, 
excluding those used for special studies by the Director of the 
Laboratories, 9,069 plants. There have been 1,719 pack- 
ets of seeds received, as follows: by gift, 26; by exchange, 
1,039; by collection on expeditions, 14; by Tens 640. 
In addition, 509 packets have been derived from collec- 
tions on the grounds. The Director of the Laboratories 
has used house 2 and parts of other houses for his experi- 
ments and those of students. Houses 5 and 6 and a part 
of house 1 contain the cactus and other succulent collec- 
tions under immediate study. The enclosure in the nur- 
sery, together with other areas outside, have been used by 
the Director of the Laboratories and students. 
LaBELING, RECORDING, AND HeErparium. Accession 
numbers 39,308 to 41,481 have been recorded, making a total 
of 2,174 accessions. A total of about 6,000 display labels 
have been made, as follows: deciduous arboretum, 472; 
fruticetum, 701; herbaceous grounds, 612; economic garden, 
13; morphologic garden, 3; west border, 78; pinetum, 747; 
trees along roads and paths, 261; conservatory flower beds, 
622; flower beds, elevated railway approach to conserva- 
tories, 1; elevated railway approach border, 5; conserva- 
tory range I, 2,045; conservatory range 2, 137; rose bed, 
283; conservatory court, 20. In addition to the above, 
54 information signs were painted for range 1, and 4 for 
nge 2. 
The following plants have been acquired: by gift, 388, 
valued at about $285; by exchange, 600; by purchase, in- 
cluding 13,784 bulbs, 15,249; by collections made by mem- 
ers of the staff and others, 1,439; derived from seeds from 
various sources, 2,621; total, 20,569. 
The herbarium of cultivated plants has been increased 
by 945 specimens. The collections contain approximately 
the following number of species and varieties: conserva- 
tories, 9,000; herbaceous, 2,860; fruticetum, 883; salicetum, 
45; deciduous arboretum, 310; pinetum, 296; viticetum, 
50; total, 13,444. 
