8vo, pp. 271,  + 5 folding plates and with numerous tables and diagrams to the text; clean; quarter red morocco over cloth boards, with gilt fleurons and lettering to spine, panels in gilt and blind, raised bands, speckled edges; some loss to leather and cloth recoloured, slackening a bit.
US $401 €339
First edition. Van Monckhoven developed an optical enlarging apparatus which he patented in Belgium in 1863, and for which he later applied for patents in England and France. The innovation described in this work earned him the bronze medal at the Paris international exhibition of 1867.
COPAC shows two copies: Imperial and St Andrews.