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" The above engraving represents this instrument, which consists of a beam, AA, of any length required, generally made of well-seasoned mahogany. Upon its face is inlaid throughout its whole length a slip of holly or boxwood, aa, upon which are engraved... "
A treatise on the principal mathematical drawing instruments employed by the ... - Σελίδα 24
των Frederick Walter Simms - 1845 - 153 σελίδες
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A Treatise on Mathematical Instruments ...

John Fry Heather - 1849 - 202 σελίδες
...well-seasoned mahogany. Upon its face is inlaid throughout its whole length a slip of holly or boxwood, aa, upon which are engraved the divisions or scale,...Ireland were divided to a scale of chains, 80 of which occupied a length equal to six inches, which, therefore, represented one mile, six inches to the mile...

A Manual of Surveying for India, Detailing the Mode of Operations on the ...

Sir Henry Edward Landor Thuillier - 1851 - 826 σελίδες
...well-seasoned mahogany. Upon its face is inlaid throughout its whole length a slip of holly or boxwood, a, a, upon which are engraved the divisions or scale, either...decimals, or whatever particular scale may be required. Two brass boxes, B and C, are adapted to the beam ; of which the latter may be moved, by sliding, to...

The American House Carpenters' and Joiners' Assistant: Being a New and Easy ...

Lucius D. Gould - 1853 - 234 σελίδες
...well-seasoned mahogany. Upon its face is inlaid throughout its whole length a slip of holly or boxwood aa, upon which are engraved the divisions or scale,...Those made for the use of the persons engaged on the ordinance survey of Ireland were divided to a scale of chains, 80 of which occupied a length equal...

The American House Carpenters' and Joiners' Assistant

Lucius D. Gould - 1857 - 464 σελίδες
...well-seasoned mahogany. Upon its . face is inlaid throughout its whole length a slip of holly or boxwood aa, upon which are engraved the divisions or scale,...Those made for the use of the persons engaged on the ordinance survey of Ireland were divided to a scale of chains, 80 of which occupied a length equal...

APPLETONS' CYCLOPAEDIA OF DRAWING

W.E. WORTHEN - 1857 - 600 σελίδες
...mahogany; upon its Fig. IB. face is inlaid throughout its whole length a slip of holly or boxwood-, aa, upon which are engraved the divisions or scale,...decimals, or whatever particular scale may be required; but ordinary beam compasses are constructed with a plain beam, with no scale whatever. Two brass boxes,...

Appletons' Cyclopædia of Drawing: Designed as a Text-book for the Mechanic ...

William Ezra Worthen - 1857 - 650 σελίδες
...its j^ "n dnsnCTp^ ff Fig. TO face is inlaid throughout its whole length a slip of holly or boxwood, aa, upon which are engraved the divisions or scale,...decimals, or whatever particular scale may be required ; but ordinary beam compasses are constructed with a plain beam, with no scale whatever. Two brass...

A Treatise on Mathematical Instruments: Including Most of the Instruments ...

John Fry Heather - 1859 - 198 σελίδες
...well-seasoned mahogany. Upon its face is inlaid throughout its whole length a slip of holly, or boxwood,- aa, upon which are engraved the divisions or scale,...Ireland were divided to a scale of chains, 80 of which occupied a length equal to six inches, which, therefore, represented one mile, six inches to the mile...

Rudimentary Treatise on the Erection of Dwelling-houses; Or, The Builder's ...

Samuel H. Brooks - 1860 - 262 σελίδες
...its whole length, a slip of holly or box-wood a, a, upon which are engraved the divisions or scales, either feet and decimals, or inches and decimals,...particular scale may be required : those made for use of the persons engaged on the ordnance survey of Ireland, were divided to a scale of chains, 80...

A Rudimentary Treatise on Land and Engineering Surveying, with all the ...

Thomas Baker (Civil engineer) - 1865 - 278 σελίδες
...decimals or inches and decimals, or such parts of either as may be required. Those made for the use of the Ordnance survey of Ireland, were divided to a scale of chains, 80 of which occupied a length of six inches, which, therefore, represented one mile, six inches to the mile being...

Treatise on Mathematical Instruments: Their Construction, Adjustment ...

John Fry Heather - 1866 - 228 σελίδες
...well-seasoned mahogany. Upon its face is inlaid throughout its whole length a slip of holly, or boxwood, aa, upon •which are engraved the divisions or scale,...on the Ordnance survey of Ireland were divided to a scuie of chains, 80 of which occupied a length equal to six inches, which, therefore, represented one...




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