
Title
A microfilter: filar position-Micrometre, the type in general use in the late 19th century
Caption
Engraving depicting a microfilter: filar position-Micrometre, the type in general use in the late 19th century. Dated 19th Century
Date
19th century
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP23A16_142
License type
Rights managed
Available size
60,0Mb (2,4Mb) / 26,7in x 8,7in / 8004 x 2620 (300dpi)