Ready reckoner 'Prompt' calculator, 19th century.
- Made:
- circa 1863 in France
Ready reckoner "Prompt" calculator invented by Am. Maurand for converting between British Imperial Measure and the French Metric System, French, 19th century.
Details
- Category:
- Mathematics
- Object Number:
- 2001-796
- Measurements:
-
overall: 25 x 100 mm
- credit:
- Tesseract