REPORT OF NATIONAL MUSEUM, 1921. 129 
thereby bringing the work up to date and making it possible to 
catalogue the accessions as received in the future. This was a large 
amount of work and took several months to accomplish it. The 
completion of the card catalogue almost marks an epoch in the records 
of the collection. Up to this year the card catalogue consisted of 
three separate systems, from which no totals could be obtained. The 
numbers now run in an unbroken series, the last entry being 3388, 
and a cross-reference is partially completed. 
The wall cases on the south side of the court were cleaned and 
material in them stored. This space was used for the Brady Civil 
War and Signal Corps’ photographs of the Great World War. This 
collection of pictures complements the war collections made by the 
Museum and attracts much attention from visitors. 
The series of partly finished lenses furnished by Bausch & Lomb 
Optical Co. makes a fine new exhibit and will be of interest to those 
who wish to learn how a fine anastigmat lens is made. There are 
many and various processes of fine workmanship which enter into 
their manufacture. 
Tn order to place new and timely exhibits, old ones must be taken 
down. This crowded condition and lack of space somewhat inter- 
feres with the growth of the collection and the desire to secure new 
material. Mr. G. S. Williams, of Washington, is a friend of the 
collection. In the past he has secured many exhibits and always 
has the advancement of the collection in mind. Likewise Mr. George 
Harris, of Harris & Ewing, sends material of Museum interest, that 
comes to him in the course of business. 
Mr. C. L. Lewis, Toledo, Ohio, past president of the Photogra- 
phers’ Association of America, often visits the collection when in 
Washington, and was instrumental in securing the transparency and 
lantern slide of the McDonough color process received during the 
year. The collections of the section are unique. The Photogra- 
phers’ Association of America has appointed a committee to form 
a similar collection, to be at Winona Lake, Ind., where they aim 
to establish a school of photography, endowed by the association. 
The formation of another collection will make competition for new 
material, and funds should be provided so the section of photography 
can purchase rare specimens when they come on the market. 
Plans for the coming year are a continuance of those formulated 
last year. A section devoted to the history of color photography 
and motion pictures is in course of development. Efforts will be 
made to secure recent pictorial photographs from America’s leading 
pictorial workers. 
