[Pamphlet advertising Defries' Patent Dry Gas Meter]
Lithograph; in ink at bottom J. S. Underwood Agent; sheet 245 x 195mm (9½ x 7¾"). Folded, glued to backing sheet, glue stains affecting paper tone.
Lithographed broadside promoting the gas meter patented by 'N. Defries, gas engineer', with prices and a diagram of the meter. The Mechanics' Magazine in 1843 compared Defries' meter with other competitors by Samuel Clegg and others.
[Ref: 33749] £120.00