116 
Challenger ** which was “ Presented by Her Majesty’s Govern- 
ment.” The last two contain Sir Daniel’s bookplate. 
Exchanges 
The library receives over 9oo serials, including periodicals and 
publications of botanical gardens, agricultural experiment stations, 
scientific societies and institutions. More than six hundred of 
these serials are sent in exchange for Brooklyn Botanic Garden 
publications. In many cases these “exchanges” had not been 
received regularly or had lapsed over a period of several years. A 
checking of the entire exchange list seemed advisable and the work 
was undertaken during the summer and early fall. Asa result of 
correspondence many of the lacking publications have been secured 
or assurance received that copies will be forwarded as soon as 
issued. A few of the “exchanges ” have been crossed off the list 
in cases where the replies or failure to answer indicated that con- 
tinuation of the mutual arrangement was not desired. 
Use of the Library 
While its main use is in connection with the scientific work of 
the Garden, the library is open also to the public for reference 
purposes, and the following actual cases during the past year are 
typical of the service rendered: an illustrator of children’s books 
used colored pictures of Mexican flowers; a local physician who 
was preparing a book on hay fever made a study of the size and 
number of pollen grains of various flowers; a list of references in 
recent botanical literature to new species of Begonias was compiled 
for an agricultural experiment station in a neighboring state; a 
member of a committee of a local organization which is preparing 
a program for tree planting consulted articles on shade trees for 
city streets; a teacher in a stmmer camp wished a list of wild 
iool graduate asked 
ary 
— 
flowers which should be conserved; a high sc 
for information about schools giving courses in landscape garden- 
ing; a designer of silks used colored plates of flowers; the author 
of the annual article on botany in the New International Itncy- 
clopedia gathered his material in this library. 
Other subjects studied were: bread fruit tree, dwarfing of trees, 
