
Wollaston's slide rule of "Chemical equivalents" in boxwood by "I. Newman
- maker:
- John Frederick Newman

Wollaston's slide rule of "Chemical equivalents" in boxwood by "I. Newman, 122 Regent Street, London" 17 1/2" x 1 5/8", c. 1800
Wollaston's slide rule of "Chemical equivalents" in boxwood by "I. Newman, 122 Regent Street, London" 17 1/2" x 1 5/8", c. 1800