Burt's patent measuring and cubing slide rule
- inventor:
- E A P Burt
Burt's patent measuring and cubing slide rule, 24 3/4" x 2 1/2" x 1/4", boxwood, one slide
Burt's patent measuring and cubing slide rule, 24 3/4" x 2 1/2" x 1/4", boxwood, one slide