A shaper micrometer scale measuring cross—feed spindle to measure the diameter by reading the raised ruler.
Grimshaw, Robert Modern Workshop Hints (Philadelphia, PA: Sampson Low Marston & Company LTD, 1902)
875×2400, 383.1 KiB
373×1024, 63.4 KiB
233×640, 29.7 KiB
116×320, 8.3 KiB