STOOL BEDS.
| NATURE. | BEDS. | BLOCKS. | ||||
| Length. | Breadth. | Thickness. | Length. | Breadth. | Depth. | |
| ft. | in. | in. | ft. in. | in. | in. | |
| 42 Pr. | 2·91 | 11 | 4·5 | 1 5 | 4·75 | 9 |
| 32 ” | 2·91 | 10 | 4·25 | 1 5 | 4·75 | 9 |
| 24 ” | 2·83 | 10 | 4·25 | 1 4 | 4·5 | 8 |
| 18 ” | 2·85 | 9·5 | 4·25 | 1 3 | 4·5 | 8 |
| 12 ” | 2·85 | 9·5 | 4 | 1 3 | 4·5 | 8 |
| 9 ” | 2·85 | 9·5 | 4 | 1 1 | 4·5 | 8 |
TUBES.
Tubes are of five different natures—viz., Common quill, and Dutch or Paper tubes for exercise, and Detonating quill, and Brass tubes; and Friction tubes for service.
All tubes are gauged to two-tenths of an inch diameter.
The pipes for the Quill tubes are 2½ inches long; and the barrels of Dutch tubes are 1¾ inch in length.[12]
Composition for Common tubes.
Mealed powder, mixed with spirits of wine into a stiff paste.
DETONATING TUBES.
The quills of these tubes are cut to 2¾ inches in length. Small, or pigeon quills, are also prepared for the arms to receive the detonating composition; these are cut to ¾ of an inch in length; and a small hole is bored in the centre to communicate the composition to the body of the tube. The body of the tube is filled precisely in the same way as common tubes.