DISCHARGE, 
‘eprefentedj in in Hg. I 13s which differs from the former only by 
having o the fide of the veifel, a contraétion 
e at ae se alge vein 
e laft rane ed be cut off at the contraction, 
and ‘~ ft conical part ae be left affixed to the aperture, 
, then the dilcharge of water is rather lefs than 
nesly oft i 
I 
increafe 
If to the {mall conical part of the adjutage, fg. 14, 
gla pipe, viz. another conical tube be applied, as in 
r6, the difcharge of water will thereby be eee 
eG a certain pe 3; for it appears that when the d 
gency is gr:ater 
d be of infinite wraehenl ufe; for the difcharge 
oe i promoted without the enlargement of the pipe; 
and in mo s fo it actually proves to be; but 
Eytelwein eae pear if the pipe, ortube, be very long, 
the advantage produced by the dl an ene ter- 
ec i s infenfible or nearly oftflor Ven- 
ing pipes wroduce? inftituted an accurate fet of e xperi- 
ments, which we fhall concifely ane as being of conkers 
able i importance in pradiical hyd 
centre of the outer ae of the adjutage, was always 
equal to 34,642 Enghfh in 
“hrough a fimple eraae sere in a thin one 
oe of the apenere peng eu to , 
41 
Through a eying tube a the fame diameter as 
nd 4.8 inches long, as in jig. - = gr! 
Trough the de 13, whichfdiffers ae ithe pre- 
ceding, by ha jaa ing oo in Hue {ape a 
he natural c ai 
Through the nae conical ene a, which i is 
only the firt con t of the precedi = 42" 
Jig. 14, and . the fame diameter; AD b Ce) 
inches lon 42!.5 
Through the like adjurages but longer, A D being 
12.8 inches long GY 
alee the like, a longer, AD being = 6 inches, es 
Phrough | an adjatape eontning of ‘the imple tubeo 
- 12, placed over the conical part of fg. 14, in - ya's 
Through the double cone, fg. 16, the a cieceoae 
o determine the precife ‘quantity of the effect, 
of which areye ABm=EF= nches, AC 
= 0.977 inches, CD = 1.376 inches, a the age 
of the outer cone = 4.351 in 277.57 
Through the adjutage, fig. 17, coming of a cylin. 
drical tube 3.2 inches long, a in in 
diameter, interpofed between she two oneal a 
of the preceding, in 28.5. 
The aa of the aisore-mentined adjstages i is the fame, 
chang is undoubtedly y owing to the eddies, and to the croff- 
ings of — various filaments of the fluid, which, according to: 
what has 
dered amber, be mike ; for vaber ae cone of the fame 
{pecific gravity as water, by the motion of its particles it will! , 
clearly fhew the various a irregular direCtions of the water 
within the tube. 
dchrge out iy a 
ftraight tube, a curved tube in a aia ntal a 
bowed tube forming a right angle (when they. are ‘all. Gruseed: 
nolizourally and in fimilar circumftances) are nearly 
5°, and 45; whence it appears, that fharp angular paaige 
aes as paffage of the fluid confiderably. more than thofe 
ular curvature.. The internal roughnefs of. a pipe 
omelas likewife to dimin:fh the difcharge. Whene 
an irregularity in the fhape of the aperture, or fom aieo 
r conformation of the veffel, compels the particles of the 
a to run obliquely towards the aperture, a circular. motion. 
s thereby foon communicated to the fluid, and an hollow 
whit! 1 is formed in the veflel above the aperture. In confe- 
uence of that circular motion, the particles of the fluid ac. 
hollow is formed, which is larger or yaa re as the 
rotatory. motion ‘of the fini is more or lefs rapid. When. 
this whirling motion is pretty gonider nie if any light bo- 
dies, floating upon the happen to come within the- 
whirl, they “will be reallly ee downwards towards the 
aperture ; for, fince the {pecific gravity of - ee is greater 
than that of the bodies, the fluid wi'l ac greater dee. 
gree of centrifugal force, and will recede (lade than thofe 
bodies from the axis of the whirl. 
e might now proceed to defcribe the form and altitude- 
of the ftream of fluid, when its direGion is either oblique, or 
perpendicularly upwards or downwards; but thele particu. 
ars more properly belong to the articles Jer andi TREAMy 
which fee, It is alfo “neceflary to oble erve, bd in ane 
courfe of the above-defcribed experiments, remarks, &c. 
ave taken no notice of any other fluid bendes hea : the 
reafon of which i is, firft, that as water is the moft 
che erate or alae at 
eftablifhed with refpe& to water, the application of the fa 
3 oils 
