( 194 ) (April, 
V. EXHIBITION OF APPLIANCES FOR THE 
PRODUCTION AND ECONOMICAL USE OF FUEL, 
IN CONNECTION WITH THE 
SOCIETY FOR THE PROMOTION OF SCIENTIFIC 
INDUSTRY, MANCHESTER. 
been to concentrate the attention both of producers 
and consumers of fuel upon the great question of 
economy, and through the medium of the Society to bring 
together those who are concerned in the speedy solution of 
the problem. 
The following was the original classification to which the 
council asked the attention of the exhibitors. No exhibitors 
have been named in classes 6 and 7; and 3 and 4 it has 
been found convenient to amalgamate. 
(1). Appliances which may be adapted to existing steam 
furnaces, &c., whereby an improved combustion of the 
fuel is secured, and a direct diminution in the quantity 
required is effected. 
(2). Appliances which may be adapted to existing steam 
boilers, &c., whereby the waste heat of the flue gases 
or of exhaust steam is utilised. 
(3). Appliances which may be adapted to existing steam 
boilers, pipes, and engines, whereby loss of heat from 
radiation and conduction is prevented. 
(4). Appliances which may be adapted to existing steam 
boilers and engines, enabling them with safety to realise 
the great economy resulting from the use of high 
pressure steam or superheated steam. 
(5). New or improved furnaces (using solid, liquid, or gaseous 
fuel), boilers and engines of all descriptions, specially 
adapted for the saving of fuel. 
(6). Apparatus which, by producing a cheap and abundant 
gaseous fuel, will supersede the costly carriage of coal, 
obviate the present enormous waste attending its use in 
the solid form, and condense and save the valuable 
sulphur, ammonia, and other by-products of the distilla- 
tion now injuriously affecting iron and other smelting 
processes, and in a vast number of operations discharged 
as poisons into the air. 
(7). Apparatus or engines for obtaining power advantageously 
from heat through any other medium than steam. 
ae chief object of the promoters of this Exhibition has 
