Diaphragm (optics) 1889 "Dictionary of Photography" (see figure), but disappeared after Ernst Abbe's theory of stops unified these concepts. According to Rudolf Kingslake, the inventor of the iris diaphragm is unknown. Others credit Joseph Nicéphore Niépce for this device, around 1820. Mr. J. H. Brown, a member of the Royal Microscopical Society, appears to have invented a popular improved iris diaphragm by 1867. Kingslake has more definite histories for some other diaphragm types, such as M. Noton's adjustable "cat eye" diaphragm of two sliding squares in 1856, and the Waterhouse stops of John Waterhouse in 1858. Diaphragm (optics) In optics, a diaphragm
She Has a Name intermission. According to reviewer Lana Michelin of the "Red Deer Advocate", Kooman's changes strengthened the emotional pull of the play. Because of the amount of interest in "She Has a Name" in 2011, not enough tickets were available for the initial run, and a second run was planned for the end of 2011. To finance a tour of the play, Burnt Thicket Theatre raised money through fundraisers, which included the 2011 Calgary Ride for Refuge. In August 2011, extracts from "She Has a Name" were read at a conference in Strathmore called Justice Tapestry. A reading of the play took