Proceedings of the P uotograpuical Section. 1087 



Mr. Kurtz exhibited a series of ver}' iiiie imperial case prints, illus- 

 trative of eifects produced in the use of his concave back ground, 

 Avhich he described as a 2:)a_pier-viache dish, or section of a sphere, six 

 feet across and two feet deep, so mounted as to be placed at any 

 desired elevation or angle. 



After some general discussion upon its merits and the beautiful 

 eftects produced, the Section adjourned to the lirst Tuesday in May. 



