REPORT OF NATIONAL MUSEUM, 1925 103 



printing for the blind may be divided into two classes, the alpha- 

 betical and the arbitrary. The additions have been almost exclu- 

 sively of the arbitrary system known as the American Braille. The 

 Museum is indebted to several organizations for assistance in this 

 line, and especially to Frank C. Bryan, Perkins Institution for the 

 Blind, Watertown, Mass., who not only contributed specimens but 

 also interested other people in the exhibit here. The reading room 

 for the blind, Library of Congress, Washington, D, C, furnished 

 information and specimens regarding a duplicating process which 

 they have been largely instrumental in developing. The Matilda 

 Ziegler Magazine for the Blind contributed, besides other specimens, 

 plates showing their method of printing on both sides of the paper 

 at the same time. Other organizations also deserve credit for addi- 

 tions that improve the exhibit. 



In connection with the new traveling exhibits, examples in their 

 respective mediums have been contributed by the United States 

 Printing & Lithograph Co., William Edwin Rudge, and the Aqua- 

 tone Corporation, of New York City, Norman T. A. Munder, and the 

 Baltimore Maryland Engraving Co., of Baltimore, and the Collo- 

 type Co., Elizabeth, N. J. Edward Epstean, chairman of the pub- 

 licity committee of the American Photo-Engravers Association, was 

 instrumental in having the association prepare special specimens for 

 the photomechanical exhibits. 



The Section of Photography has shown good progress during the 

 year. Three early Prosch camera shutters were donated by Floyd 

 Vail, H. A. Latimer, and Frank V. Chambers, respectively, and show 

 the effort to control exposures automatically and do away with the 

 lens cap. A very remarkable view camera, manufactured by E. & 

 H. T. Anthony, was also donated by Mr. Vail. This camera shows 

 the revolving back, no doubt an advanced idea in camera con- 

 struction when it was made about 1890. The entire back with the 

 bellows revolves in a ring in the front board. A reel of motion 

 pictures, historical in character, was contributed by the Armstrong 

 Cork Co., the subject being Frederick Walton, the inventor of lino- 

 leum. This film, with other of like character, is being preserved as 

 a matter of record. 



To his display on the wireless transmission of pictures, C. Francis 

 Jenkins added a series of 18 prints sent by the method invented by 

 him. These show early and more recent results, the latter closely 

 resembling soft-focus lens work. The collection of Eadweard Muy- 

 bridge material was rounded out by a fine portrait of Mr. Muy- 

 bridge, made from an original negative owned and loaned for the 

 purpose by Miss Frances Benjamin Johnston. 



