35

Hydraulics*

sel at P, CL, or R, than through the Ad-jutage P B inserted in those Holes, and

farther still in Proportion as the Adjutage

is .

v, directed to the middle Point F of the Semicircle ;and any two Jets equally distant, as B, H, go to thefame Distance K N on the Horizon. If the Adju-tage be horizontal, the Jet will be a Semi-parabola; ifoblique, it will be a whole Parabola. All which Particu-lars were observed to be the Properties of the Motion otsolid Projectiles; a Jet of Water being every Way the

fame as a Discharge of small Shot. AtarriT

7- But to apply this more particularly: Let xlXl

" e a Fountain and Conduct-Pipe with an Adjutage ^kroveable on a Joint, to be set in any Position; as per- 5*P e ndicular, as at I ; oblique, as at K ; or horizontal,

?? at L. In the first Cafe, a Jet will play upright toP i the Height of which Jet I D is the Impetus, or the^easure of the Force of the Machine to project thep luid. If the Adjutage be placed obliquely, as at K-,

^e Jet of Water will be the Parabola K F H j but ifPlaced horizontally, as at L, it will form the Sam -Parabola L N, Now in this latter Cafe it will be LM

: MN -- M N = Lotus Return of the Parabola

LM

UN when compleated.

But it has been shewn, that the Impetus 1 D, or•force by which the Parabola is described, is equal toone fourth Part of the Lotus Helium, (Jnnot. XXXlil.

, MN“ r

12, 1 therefore it will always be ID cone "

quently, 4 L M : M N :: M N : 1D. So that if we -lee a Jet of Water at any Time, and would know theHeight of the Reservoir whence it comes, we can easilyfind it by the Proportion above, because the three first1 erms are always advert by Measurement.

9- By this Means also we can estimate/the Force byf £ „, h an y Fluid is projected, where no Reservoir orPressure of Fluids is concern’d, but the Action of Solids;

* s the Force by which the Urine is protruded ; tne’ n 9. F^cs