20863
M D G C J E F
No. 2. Amsler’s Patent Planimeter in Electrum, arranged for measurement of areas in square inches (or other unit if specially desired). Range: a circle of 18 in. diameter ... 38/6
No. 4. Amsler’s Patent Planimeter in Electrum, arranged for measurement of areas in either of several units, English and French, by means of a sliding tube. Range: a circle of 24 in. diameter ... 55/0
No. 6. Amsler’s Patent Planimeter in Electrum, arranged for measuring areas in either of several units, French and English, and with special arrangement for rapidly finding the mean height of indicator diagrams. Range: a circle of 25 in. diameter; length of diagrams, 2—8 in. ... 65/0
The above are delivered Carriage Free, subject to the Conditions set forth on pages [3] and [4].
[318]
LOOSE DRAWING INSTRUMENTS.
| LONDON MADE. | ||||
 | ||||
| HALF SETS. | ||||
|---|---|---|---|---|
| Electrum | Ex. | |||
| Brass | Qulty. | |||
6 in. long steel joint, with pen and pencil joints | ... | 4/6 | 6/0 | ... |
6 in. sector joint, with pen and pencil joints,and knife-key | ... | 11/0 | 12/9 | ... |
6 in. sector joint and double joints | ... | ... | 17/0 | ... |
6 in. sector joint and double joints, and needle points | ... | ... | 16/6 | ... |
6 in. sector joints and double joints, and improved needle points | ... | ... | 20/0 | 24/6 |
| DIVIDERS. | ||||
Dividers, steel joint, 4 or 5 inch | ... | 1/10 | 2/1 | ... |
Dividers, sector joint, 4 or 5 inch | ... | 2/6 | 2/9 | ... |
Dividers, sector joint, 4 or 5 inch, and improved hair spring | ... | 4/3 | 4/10 | 5/6 |
| BOWS. | ||||
Bows, pen or pencil ... | 1/6 | 2/6 | 2/1 | 3/6 |
Bows, pen or pencil, double jointed | ... | ... | ... | 6/9 |
Bows, pen or pencil, and improved needle point | ... | ... | ... | 7/9 |
| SPRING BOWS. | ||||
Bows, Spring, set of three in case, Electrum | ... | 5/9 | 10/3 | 12/6 |
Bows, Spring, set of three in case, and needle point | ... | 10/9 | 15/0 | 17/0 |
 | ||||
| DRAWING PENS. | ||||
| Electrum | Ex. | |||
| Brass | Qulty. | |||
Drawing Pens, 4½ or 6 in., fine steel, ivory handles | ... | 1/2 | 1/6 | 2/1 |
Drawing Pens, 4½ or 6 in., lift-up nib, ivory handles | ... | 2/1 | 2/9 | 3/6 |
Drawing Pens, extra strong steel nibs and joint | ... | — | — | 4/6 |
Drawing Pens, Double or road pen | ... | — | 4/9 | 5/6 |
Drawing Pens, Dotting with set of four wheels | ... | — | 5/6 | 7/9 |
Needle Holder or Pricker | ... | — | — | 2/5 |
Opisometers | ... | — | — | 3/0 |
| ENGINEERS’ AND ARCHITECTS’ DRAWING BOARDS. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| (TO ORDER ONLY.) | |||||||||
Made of the finest dry pine, with mahogany battens, brass slots,and one edge inlaid with ebony. | |||||||||
 |  | ||||||||
| BACK VIEW. | FRONT VIEW. | ||||||||
| Half Imperial | ... | ... | ... | Size | 22¾ | × | 15¾ | in. | 7/0 |
| Half Double Elephant | ... | ... | ,, | 28 | ,, | 21 | ,, | 9/6 | |
| Imperial | ... | ... | ... | ,, | 32 | ,, | 23 | ,, | 10/0 |
| Double Elephant | ... | ... | ... | ,, | 41 | ,, | 28 | ,, | 14/3 |
| Antiquarian | ... | ... | ... | ,, | 54 | ,, | 32 | ,, | 22/6 |
| DEAL CLAMPED DRAWING BOARDS. | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 16 | in. | × | 11½ | ... | 1/2 | each | 22 | in. | × | 17 | ... | 2/2 | each | |
| 19 | ,, | ,, | 13½ | ... | 1/6 | ,, | 28 | ,, | ,, | 19 | ... | 3/2 | ,, | |
| 20 | ,, | ,, | 15½ | ... | 1/11 | ,, | 31 | ,, | ,, | 23 | ... | 4/0 | ,, | |