In Solid Brass or Electrum made to Order.
UNIVERSAL SCALES.
ASTON & MANDER SOHO. LONDON
| Boxwood, | 12 in. | Armstrong, | Builders’ | or Architects’ | ... | 1/3 | each |
| Ivory | ,, | ,, | ,, | ,, | ... | 7/9 | ,, |
CHAIN SCALES.
| Boxwood, 12 in. Flat Section, | fully divided | from 10 to | 60 divisions, | 1/3 | each |
| Ivory 12 in. Flat Section, | fully divided | from 10 to | 60 divisions, | 6/6 | |
| Ivory offsets, 2 in. | fully divided | from 10 to | 60 divisions, | 1/4 | |
| Boxwood offsets, 2 in. | fully divided | from 10 to | 60 divisions, | 0/5 | |
| Mahogany case of 6 chain scales and offsets to match | ... | 13/3 | |||
| Special Scales made to order. | |||||
PLANIMETERS (Amsler’s Patent).
For rapidly and accurately computing the
contents of any regular or irregular figure.
