[Item 1] Celestialite glass for producing artificial daylight. 1916. 4 l. 21 cm.--[Item 2] Celestial light: it has been imitated. 1925. 2 l. 33 cm.--[Item 3] 2 photographs of Celestialite installations. 1930. glossy black and white photos. 2 l. 19 x 24 cm