Hydraulics.

the Nature and Effed of *(p en dtatoeasily understood from a P F

is but 1,6, we have t Ctroke would be,loft

therefore 4 Parts in 5,6 of such tbe Way, that

or ineffectual. We may here observe bv » an d thesince the Velocity of the Water a t v, e piston (with-greatest Velocity which can be given, 0 therefore aout damaging the Machinery) lS ", pj„ e 0 r BarrelPiston working at the lower End 0 , t0 prevent

"will always have W ater more than e»ny void Space or Loss of Labour. ^hc Pip® at

7- But since we sind so great a , tis evident if

P of the fame Diameter .with the r » ^ Pipe as

We contract all the Parts below F in was for the&D, and let the Part FG remain fo a t then

Barrel of the Piston to play m ’ a ®, r q w ith a greaterthe Water will rife into the Barrel r pipe IS less iVelocity than before, in propor 1 _ ^ ta that of the

consequently if the Bore of the P p> or the WaterBarrel FG, as the Velocity of^ ]VaUr in the Pip,th - Barrel, is to the V^J f Water to prevent

There will always be a Sufficiency ^ ^ g ymbo l s ^

a V actium in the Barrel. \s • v ‘ whence D* v —

thus expressed ; DD : da - - ’ f w hich Quan-

*V for a general Canon ; any f oun d

tities being given, the fourth may be • were

8. Thus, for Example, suppose?, a ^

Py/ v . Let the Diameter

47

given to siud d, we have ^ ~.

of the Barrel D = 6 Inches. And foppo^gives Lo Strokes in a Minute, each a twC U r ent thenspending as much Time in its Ascent as Minute,

Will the Motion of the Piston be BoF e ® P ^ obtain

ot 1 4 per Second ; whence v—ib ? a T’ c tbe Pipe

the Value of U, we must six on the Long jrfova-

Pp, which let he 16 Feet, then the ng t0 the

tion of the Piston will be 18 Feet (if 1 therefore Pl-XI-A'

Bottom of the Barrel, as it ought to o,; /j p a cts Fig- 3 '

J n Height of Water of 18 Feet in the rump a „ a fost