1851 Great Exhibition: Official Catalogue: Class V.: John Craig

Figure 1

Figure 2

776. CRAIG, JOHN, 51 Cornwallis Street, Liverpool - Designer and Manufacturer.

Portable weighing machine, furnished with an enamelled scale-plate to be used at pleasure (see fig. 1).

Cotton, sack, or bale weighing machine, on wheels (see fig. 2).

Library machine for weighing, also for measuring the stature.

Chimney-arch and smoke-damper, to be applied in the first construction of chimneys. Its use is to allow the cold air of the apartment to mingle regularly with the heated air in the chimney, and prevent smoke. The damper is worked by a small rod at the back of the grate, and can be regulated at pleasure. When shut, it prevents all down-blasts, and is serviceable when the chimney is on fire. It can be removed when the chimney is to be cleaned, and easily replaced. A smoke-damper, to be applied to chimneys already built.

See Also

• 1851 Great Exhibition: Official Catalogue: Class V.