[ "0 ] 
the aperture for the effluent water was the fame* 
Hence the quantity of water expended by any given 
head, and opening of the fluice, may be obtained : for 
by obferving how many flrokes a minute was fuffi- 
cient to keep up the furface of the water at the given 
height, and multiplying the number of flrokes by the 
value of each, the water expended by any given 
aperture and head in a given time will be given. 
Thefe things will be further illuflrated by going 
over the calculus of one fett of experiments. 
Specimen of a Sett of Experiments. 
The fluice drawn to the i ft hole. 
The water above the floor of the fluice 30 Inches. 
Strokes of the pump in a minute — 39^- 
The head raifed by 1 2 flrokes • 2 1 Inches. 
The wheel raifed the empty fcale, and made turns 
in a minute ___ 80 
With a counter- weight of 1 lb. 8 oz. it made 85 
D° tried with water — 86 
N° Weight. 
lb. oz. 
1 — • 40 
2 — 5 0 
3 - — 60 
4—70 
5 — 80 
6 ■ — 9 o 
7 — 10 o 
8 — no 
9 — 12 * 
Turns in a min. 
— 45 — 
— 42 — 
— 3 6± — 
— 33 * — 
— 30 — 
— z 6 j- — 
— 22 — 
— ■ i6| — 
ceafed working. 
Produtt. 
1 80 
2 10 
2 iy\ 
2 3 6 j 
240 maximum. 
238? 
220 
18 if 
* N. B. When the wheel moves fo flow as not to rid the wa- 
ter fo fad as fupplied by the fluice, the accumulated water falls 
back upon the aperture, and the wheel immediately ceafes moving. 
Counter 
