 Instead of perpendicular lines or bars, the board had its surface divided by sets of parallel grooves, by stretched wires, or even by successive rows of holes. It was easy to move small counters in the grooves, to slide perforated beads along the wires,...  Treatise on Arithmetic, Practical and Theoretical - Page 42by Dionysius Lardner - 1834 - 353 pagesFull view - About this book
 | Sir John Leslie - Arithmetic - 1820 - 274 pages
...or bars, the board had its surface divided by sets of parallel grooves, by stretched wires, or even by successive rows of holes. It was easy to move small counters in the grooves, to slide perforated heads along the wires, or to stick large knobs or round-headed nails in the different holes. To diminish... | |
 | J. Taylor - Curiosities and wonders - 1822 - 220 pages
...or bars, the board had its surface divided by sets of parallel grooves, by stretched wires, or even by successive rows of holes. It was easy to move small...knobs or round-headed nails in the different holes. To diminish the number of marks required, every column was surmounted by a shorter one, wherein each... | |
 | Curiosities and wonders - 1825 - 266 pages
...or bars, the board had its surface divided by sets of parallel grooves, by stretched wires, or even by successive rows of holes. It was easy to move small...beads along the wires, or to stick large knobs or round headed nails in the different holes. To diminish the number of marks required, every column was... | |
 | Cyclopaedia - 1852 - 256 pages
...grooves, or by stretehed wires, or even by sueoessire rows of holes. It was easy to move small eounters in the grooves, to slide perforated beads along the wires, or to stiek large nobs in the different holes. To diminish the number of marks required, eaeh eolumn was... | |
 | Edward Brooks - Arithmetic - 1876 - 588 pages
...or bars, the board had its surface divided by sets of parallel grooves, by stretched wires, or even by successive rows of holes. It was easy to move small...knobs or round-headed nails in the different holes. To diminish the number of marks required, every column was surmounted by a shorter one, wherein each... | |
 | Edward Brooks - Arithmetic - 1880 - 584 pages
...or bars, the board had its surface divided by sets of parallel grooves, by stretched wires, or even by successive rows of holes. It was easy to move small...slide perforated beads along the wires, or to stick hirge knobs or round-headed nails in the different holes. To diminish the number of marks required,... | |
 | Cyclopaedia - 1852 - 264 pages
...improved by dividing the surface of the board by sets of parallel grooves, or by stretched wires, or even by successive rows of holes. It was easy to move small...perforated beads along the wires, or to stick large nobs in the different holes. To diminish the number of marks required, each column was surmounted by... | |
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