[Photo-zincographs in On photo-zincography and other photographic processes employed at the Ordnance Survey Office, Southampton].
Longman, Green, Longman, Roberts, & Green[Photo-zincographs in On photo-zincography and other photographic processes employed at the Ordnance Survey Office, Southampton]. Plate no. 1.: Plan of camera and stand, Fig. 1. Section & elevation of camera & stand, Fig. 2. Elevation of back of camera & portion of stand, Fig. 3. Photo-Zincograph. 31 x 24.5 cm.