The Sixth Annual Convention of the Biological Photographic Association will be held in Boston (Hotel Lenox) from September 24 to 26. An invitation is extended to scientists to attend. There will be an exhibition of photographs from all over the country and of the most modern equipment and supplies.
Active membership is open to those whose duties include biologic photography. Any one who is interested in such photography may become an associate member. The annual dues, including a subscription to the journal, are $3.00. Further information may be procured from the secretary, Miss Anne Shiras, the Magee Hospital, the University of Pittsburgh, Pittsburgh.
The following papers are included on the program: "Ultra Slow Mercuric `Spark' Motion Picture Apparatus," by Dr. H. E. Edgerton, of the Massachusetts Institute of Technology, Boston; "Print Quality," by Ralph P. Creer, of the Veterans Administration, Hines, Ill.; "Infra-Red Photography," by Leo C. Massopust, of the