e Has a bolster hung upon C springs.
f Is a system of curved springs, with three points of connection to the bed and two to the axles.
Weight of Elliptic Springs.
| 1¼ × 3 × 36 | inch, | weight about | 28 | lbs. | per pair. |
| 1¼ × 4 × 36 | „ | „ | 34 | „ | „ |
| 1¼ × 4 × 38 | „ | „ | 36 | „ | „ |
| 1½ × 3 × 36 | „ | „ | 37 | „ | „ |
| 1½ × 4 × 36 | „ | „ | 41 | „ | „ |
| 1½ × 4 × 38 | „ | „ | 45 | „ | „ |
| 1½ × 5 × 36 | „ | „ | 48 | „ | „ |
| 1½ × 5 × 38 | „ | „ | 51 | „ | „ |
| 1½ × 5 × 40 | „ | „ | 54 | „ | „ |
| 1¾ × 4 × 36 | „ | „ | 49 | „ | „ |
| 1¾ × 4 × 38 | „ | „ | 52 | „ | „ |
| 1¾ × 4 × 40 | „ | „ | 55 | „ | „ |
| 1¾ × 5 × 36 | „ | „ | 56 | „ | „ |
| 1¾ × 5 × 38 | „ | „ | 60 | „ | „ |
| 1¾ × 5 × 40 | „ | „ | 64 | „ | „ |
| 1¾ × 6 × 36 | „ | „ | 64 | „ | „ |
| 1¾ × 6 × 38 | „ | „ | 68 | „ | „ |
| 1¾ × 6 × 40 | „ | „ | 73 | „ | „ |
| 2 × 4 × 36 | „ | „ | 58 | „ | „ |
| 2 × 4 × 38 | „ | „ | 62 | „ | „ |
| 2 × 4 × 40 | „ | „ | 65 | „ | „ |
| 2 × 5 × 36 | „ | „ | 63 | „ | „ |
| 2 × 5 × 38 | „ | „ | 67 | „ | „ |
| 2 × 5 × 40 | „ | „ | 72 | „ | „ |
| 2 × 6 × 36 | „ | „ | 75 | „ | „ |
| 2 × 6 × 38 | „ | „ | 78 | „ | „ |
| 2 × 6 × 40 | „ | „ | 85 | „ | „ |
FOOTNOTES:
[1] It is the plates that are tempered and hardened, not the spring.
CHAPTER IX.
WHEEL-PLATES AND FORE-CARRIAGES.
The following is given in the “Coachmaker’s Handbook” under the heading of “Short and Easy Turning:”—
“To bring a carriage into a different course from a straight one requires a circular motion, and at half a turn a carriage has established itself in a right angle to its position when at rest.
“A two-wheeled vehicle turns on one wheel, which forms the centre at the place where it touches the ground, and the opposite wheel forms the circle struck from the said centre. The body in this instance follows the circular motion exactly as the axle, and consequently maintains a steady position above the wheels.