Mr. ' Is to mix ol c iy, l" <;' and ■ i si- r quantity oi wati r, with is
- iti i ( i
d-a b s and 18
- | > powder ; or the
Bame pr. ; r, with 15 <|ti:irt-. ol red-ochre, or the dnum of aquafortis, and 15 quarts of common sail ; or, 1 stly, to mix IS quarts of th I herring- pickle, and 15 quarts of red-ochre, with 75gallonsofw ater, — All I different so) >x re- ius in rxti'. ig the most powerful for that | otfa r of the various inven- tions for extinguishing fire by che- mical means, deserving" of notice, is the composition prepared by M. A' on Akkn, and which consists of jthe following ingredients : Us, Burnt alum - - - - 30 riol in powder - 40 C inabrese, or red-ochre, 1 pulverized - J Potters*'-, or other clay, 1 finely pounded and sifted j Water ----- 630 With 40 measures of this liquor an artific ial fire, which would have required the labour of twenty men, a :d 1500 measures of common water, was extinguished, under the ftion of the inventor, by three persons. The. price of this com- pound solution is estimated at one any per pound. Hater Engines for extinguishing fire. These are either forcing or lifting pumps ; and as they are made to move with great velocity, fheif execution principally dep 20 F I R [283 (.11 tl c length of th< ir levers, and the force with which they are
or] - d. arii k have been con-
!<vt- e follow ing, as they are the most in enious, and at the same time calculated to produce the greatest effects. — In the year 1785, th ■ sili 1 r medal and twenty guineas were confi rrccl by the " Society for the I t of Arts," fee- on Mr. Fuhst, as a reward for his contrivance to increase the effect of engines in extinguishing fires; ieh the following is a short iption : From a platform rises right pole or mast, of such be judged necessary; a gaft slides upon it in an ascend- ing direction, and along both is . t d the leather hose from the rhe branch, or nose-pipe of the engine,, projects at the extre- mity of the gaft : towards which an iron irame is fixed, whence two chains are suspended : and from these hangropes, which serve to give an horizontal direction tothe branch; while other ropes, that run through proper pullies, and are thus con- veyed down the mast, serve like- wise to communicate a vertical motion to it. By these means, the branch or nose-pipe of the engine is conducted into the window of any room where the fire more im- mediately rages; and the effect of the water discharged is applied in the most efficacious manner to the extinguishing of the flames. A patent was granted in January 1790, to Mr. Joseph Bramah, of Piccadilly, and to Mr. Thomas Dickenson, of Bedworth Close, in the county of Warwick, for a new improved engine on a rota- tive principle. The merits of tliis machine depend on its having two wheels
