149 
TRANSACTIONS OF THE SECTIONS. 
estimate at between .£450 to ,£500. The quantity of fuel required1 to keep the 
engine at work night and clay for a hundred days would be a jou - • . 
In addition to the process of ventilation, we propose also to ndupt t ie cn ^" C ’° 
'•vend other purposes, such as the loading and discharging of the vessel, lifting t e 
whom, puraping the ship and supplying water to the water-closets, and fo c c .u - 
•ng the decks. Further, it is proposed to apply the waste steam io the pu 1 
cooking. 
On the (Economical Working of Sinara Boilers and /• nnieces, by the saving 
of Fuel, unlh a more speedy command of Steam. Jig \\ • Hay, London. 
first patent of this description of furnace had all moving bars, put in motion 
. w? eral cranks, levers, &c., and though found to be a great improvement upon 
J'atMjnary bars, were liable to derangement in the hands of careless stokers. 1 lie 
’"ether improvements consist in the simple use of toothed or serrated liars, with 
'MKfrs, supported by brackets in tubular, and by boxes under round, waggon, or 
c, lier shaped boilers, pans, &e. On the rockers, moving serrated bars are placed, so 
* to wurk alternately between fixed serrated bars. By use of a hand-lever, the 
!l,ikCr easily effects a movement of the reciprocating bars, and at once cleans the 
«"rc surface of the fir,--.rate from du-l and small coders, thereby p«eventing the 
'Nation of clinkers to a great extent, and the burning away of the bars, while fresh 
ir passes more freely between the bars, causing a more pcrtect and brisk combus- 
l ^ e foci, and consequently rendering it possible to have a better fire with a 
' °f fuel, and to generate steam more quickly. 
On the Prevention of Boiler Explosions. By II. Dikcks. 
Ba [ h(: plan ,V|r - Bircks proposed is to have a pipe leading from a cistern of cold 
k eM ,P ass fhrougl, the boiler, whilst the stopcock that opens the passage is to be 
JihU 08Cd a c hain within the boiler, and in which chain one link is made of 
metal. 
On a New Washing Machine, By J. Eldhidge. 
On the Consumption of Fuel and the Prevent ion of Smoke. 
^ By W. Faiiibaihn, C.E., F.ft.S. 
Phidi ,t baim «PWned the principles on which the perfect combustion of fuel de- 
meani air- his opinion that bv proper attention and by the adoption of tlie 
fright lip Jr , * no ' vn and practised, the issuing of smoke from steam-boiler furnaces 
baiter • prevented. The great secret is to have sufficient capacity in the 
fori. ai u | 7 11 the boilers had double their usual capacity, the perfect combustion of the 
Werred tn ?. l ’ scr l UOnt l>% the prevention of smoke, might he readily accomplished, lie 
,s a oifficienr 0 - j aftl ‘ cn ®* np furnaces of the Cornish mines to prove that when there 
"•entto A ,u ducement to the proprietors by the saving of expense, and of incite- 
special by competition, the emission of smoke is prevented without 
r ; ,r,1 ^vvhi,K r l an8Cnu ' nt to produce that effect. Mr. Fairbairn then described a 
H It cons’. c ° nceivwl ottered great facilities for the more perfect combustion of 
i’ t l n S mixed t' S S i° f two f urnap es united into one, the gases issuing from the coals 
i r, dgo of (L„ .8®“ier in a single chamber and then passed in a heated state over the 
hre ‘liars clean f ma l C ' ' vherc the >' !irC! ‘Suited. Bv this means, and by keeping the 
n mr the admission’ of air, the combustion was rendered very complete. 
On t/ie Solidification of Bodies under great Pressure. 
..This n ape . % W. Fairbairn, C.E., F.R.S. 
'•'natlf, the results of a portion of the experiments conducted by 
an? 1 °f hinds nf a and Mr. Joule, at the request of the Association, and by 
t * u H, M r H one 1C ° f ° r tluit P ur P° se by the ltoyal Society. At the last meeting 
pmns alluded to these experiments, and then explained the nature 
