58 
— 
wel 
portunity for such work here, but creates a need for it, and it is 
as horticultural varieties, not only affords a favorable op- 
hoped that funds may soon become available for the initiation 
of work in plant breeding with special reference to the genetics 
of roses and other ornamentals. 
Research Papers Published.—The total number of research pa- 
pers published by the Garden in 1930 was 142, occupying 2451 
pages. These include the papers by those not members of the 
Garden staff, published in American Journal of Botany, Lcology, 
and Genetics. 
Special reports on Research during 1930 may be found on pages 
78-91, 
Library 
New Library Stacks.—As stated in the preceding annual report, 
the lowest bid for new metal library stacks was $3,426.23, received 
from the Art Metal Construction Co. The contract (Park De- 
partment No. 97422) was awarded to the lowest bidder and the 
work was completed March 25. This additional equipment. not 
only met a pressing need, but has added much to the attractiveness 
of the library. 
Growth and Use—As noted in Table I, page 42, the total 
number of volumes and pamphlets has increased from 11,778 in 
1920 to 27,770 at the close of 1930. Special attention is called to 
the important accessions, including the Pre-Linnaean works, the 
autograph letters and portraits of botanists, and association books, 
as noted by the librarian in his appended report. 
The increased use of the library from approximately 1400 in 
1920 to more than 3100 in 1930 is gratifying. It should be kept 
in mind in this connection that this is a reference library, no books 
being loaned to individuals. 
Herbarium 
New Cases——As recorded in the previous report, the contract 
(Park Department No. 96148) for supplying the new metal her- 
barium cases was executed on November 21, 1929, with the James- 
town Metal Equipment Co. The work of installation was com- 
pleted on February 3, at a cost of $5,957. This nearly doubles 
