Ropp's calculator and short-cut arithmetic; a new and comprehensive system of time and labor-saving tables, also the rules, principles and short-cuts of arithmetic, mechanics and mensuration concisely and clearly stated for practical use, handy review and ready reference for the use of farmers, mechanics, business men, bankers, miners, laborers and dealers in grain, stock, cotton, hay, feed, coal, lumber, etc.,
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| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
Chicago, Ill.,
C. Ropp & sons,
c1912.
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| Edition: | 10th rev., enl. and greatly improved ed. |
| Subjects: |