a description of a machine to blow fire by the fall of water; by james stirling, f. r. s

A Description of a Machine to Blow Fire by the Fall of Water; By James Stirling, F. R. S.Author(s): James StirlingSource: Philosophical Transactions (1683-1775), Vol. 43 (1744 - 1745), pp. 315-317Published by: The Royal SocietyStable URL: http://www.jstor.org/stable/104473 .

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[ 3[5 ] vafis rotatis pllIvinaria loco manuum applicallturX eleEtricitas decrefcit.

XIX. X l)eJ:rtption f a Machine to blaw Fire by the Fall of Water; by James Stir- ling, F. R. S.

See TAB. I. Zi. 6.

Scad March 2xf, AB C s is a Pit dug in the Ground,

I744-5* whofe Surfice is higher at i) than

on the other Side at S. Thc Botrom B C is Pcrongly ramm'd with Clay, upon which are laid thin fawen Deals.

In this Pit is fixed a Tub GHKI without a BotZ tom, having a Hole I Xt the lower Part of the Side, and all round the trub is ramm'd with Clay, except at thz Hole 1.

In the middle of Jhe upper End of the Tub is fixed aZ Pipe P2RS; at the higher End of svhich are four FIoles pointing downwards, whereof twto are reprefented by S and R. - SRTU is a Funncl fixed onw the Top of the

PipeX with a Throat XZ rlarrower tha-n tlle Bore of the Pipe. In the upper End of the Tub towards one Side is fixed a crookcd Pipe at L M; tapcring to ths End at NX It is made of Wood fe f ar as 0,: but from O to 1\1 of Iron, the Fire bei-ng fuppofed at N. E F is- the Surface of a plain Stonc, raited up in tlzz middle of the Tub, dired;tly under the Pipc ?2#S.-

[ 3[5 ] vafis rotatis pllIvinaria loco manuum applicallturX eleEtricitas decrefcit.

XIX. X l)eJ:rtption f a Machine to blaw Fire by the Fall of Water; by James Stir- ling, F. R. S.

See TAB. I. Zi. 6.

Scad March 2xf, AB C s is a Pit dug in the Ground,

I744-5* whofe Surfice is higher at i) than

on the other Side at S. Thc Botrom B C is Pcrongly ramm'd with Clay, upon which are laid thin fawen Deals.

In this Pit is fixed a Tub GHKI without a BotZ tom, having a Hole I Xt the lower Part of the Side, and all round the trub is ramm'd with Clay, except at thz Hole 1.

In the middle of Jhe upper End of the Tub is fixed aZ Pipe P2RS; at the higher End of svhich are four FIoles pointing downwards, whereof twto are reprefented by S and R. - SRTU is a Funncl fixed onw the Top of the

PipeX with a Throat XZ rlarrower tha-n tlle Bore of the Pipe. In the upper End of the Tub towards one Side is fixed a crookcd Pipe at L M; tapcring to ths End at NX It is made of Wood fe f ar as 0,: but from O to 1\1 of Iron, the Fire bei-ng fuppofed at N. E F is- the Surface of a plain Stonc, raited up in tlzz middle of the Tub, dired;tly under the Pipc ?2#S.-

The The



r 316 ] The running Waker being let in tt the Top of

the FunneJ, fills tllro' the Pipe upon EFthe Ston$ in thz Tub; it runs OUt at the Hole I, but cannot ,ct off till it- xifes as lliL>h as H.

This raifcs .it in tlle -T-ub almoA uP to the Surfacc of the Stone, and it muA not rilSe higher.

So nzuch Water mtlPl run in At tllc Top of the Funnel) as -will keep it always full, or nearly fo.

This FIeigllt of Water rqueezeS it into the Pipe Witll a grcat Velocity; but, fitlce it paSes thro' tlle Throat of the Fllnnel, which is of a ftnallcr Eore than the Pipe, Roonz is left all round tbe Vein of M7ater for the Air to cnter at the Air-Holes.

It no fiooner enters but it mi.YeS witb tJle \Mater, on the Aczount of the Rapidity of the Motioll; and both tot,ether make a wllite Froth7 and intirely fill the Bore of the PipeJ When this Froth falls on the Stone in the Tub, it is dalhcd into [mall Particles, which difengages the- Air from tlle Water The Air cannot get out at P2, the End of the Plpe becauie it is fill'd with £11e Frotll7 uthicll fall-s xvitll a great Force; neither can it get out at tllc Hole I, becauSe the Sur-face of the Water is kept fo higll above it; and for tllat Reafon it ru{hcs out at 1\1; and -if tlle Hole i\1 be llopped, the Air will foon force a11 tlle Water in tlue Tub out at 1, and tllen follow it.

The mo(t convenient \May of regu5atitlg the Blall, is to bore a Enzall Hole in tlle Bla Pipe; and, by ebe Help of a Pin in it, to let OUt Brhat Air tIzcre nay be tnore than is svantcd

Tlle Dirnel fions of fucll an Eizginc ftlff;c.ently bi", to [melt harder Ore tl1an any in Lcad-Hills7 are Ct donvn at tlzc Bott-olut

Fcctz



Pcet.

Height ckf £1le Funnel " - - * * Lengtb of the Pipe - ^ - - Height of the Tub - - - - - - Diameter of the Tub - - - - * Height of the Srorxe in the Tub -

Diameter of the Throat of the Sunnel Diameter c)f thc Bere of the Pipe - Diameter of the BJa(} Hole at N " Flole At I about s Inches rquare, Diameter of the Air-Holes * -

s I4, I5, or I6

6

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This Erlgine is likewife of admirable Ufe eo cont vey frelh Air into the Works; whlch faves the dou- ble Drifts arld ShaftsX and cutting Communications betweca themv A fmall one will do very well for a BlacS Emith.

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a description of a machine to blow fire by the fall of water; by james stirling, f. r. s

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