8 ?

Hydraulics.

7 *S a Notch on the other Side to take in the Wateriom the Force-Pipe, and conduct it to the Boiler B.th° W ^*' s * s ^ one j i s ealy to conceive from a View of, e two Sections of the Cock and Key in two Positions^thin it. 3

lo. The Boiler may hold about 5 or 6 Hogsheads,jj Receiver x Hogshead ; It will work 4 or 5°Urs, without recruiting; about 4 Strokes per Mi-•y., e tvill produce upwards of 200 liogfheads^rr Hour.yy IS Steam makes a Vacuuin so effectually, as to raisea , ater fr°m the Well to the Height of 29 or 30 Feet;

^ , Oppose the Steam able to lift up the Steel-yard,th Weight hanging at the 6th Division, it willhi»k a hle to raise a Column of Water about 50 Yards0 p b ’ as being then 6 Times stronger than the Pressurelaid ^' r ’ as ‘ s e asy to understand from what has been/<> °n this Subject of the Common Water-Engine-dnnotat. LXXX. 5.) the Water being raised in ayy 1 ar Manner in both Machines ; there by the Pressurer .Spndenfed elastic Air; and here by the Pressure ofri hed elastic Steam.

jy 11 - The Elasticity of the Steam increasing with its- eaf Y and the Space into which it endeavours to ex-' t Mf being as its Elasticity or Strength, and sincey ittiow (by what precedes) that Water expanded intoof the same Strength of the Air, occupies nearstle°Q times the Space as before, it follows, that whenint V^am has twice that Strength, it will be expandedi t o.ovOg j if i t f, e $ times as strong as the Air’s Spring,and r become expanded into 15000 times that Space,a]] ?.° n > beyond the reach of Experiments. From

a PPr ■ ^ ^ a PP e ars how near a perfect Vacuum we mayr ar] ’p 0ac ii by this Engine, or any other, by means ofed Vapour.

there t ^ ie P^^'{f 0 P^' lca ^ ra,1 s a, ^' ion5 -) N"461. Plate

ls an Account of an Improvement .made in the XXVI.

■ ire.t'

t r j v 'j n S ine by Mr. Payne , as follows. He has con- pig-, 8.

ve <J tWn ... i_ __• ) t?_:"

Ve rted

two Iron Pots or Vessels of a conical Form in-

, on the upper Part of

Whin’. represented by A B E F.ls “* e d a round globular C

p ” “T u 11 rouna gioDuiar Copper Head (of aboutrk^T p' ameter ) as L M N. There is then placede Inside a small Machine H, call’d the Dispenser.

G

>

with