on Rivers and Canals 
« 
N. 
Table of experiments made to afcertain the times of 
paffage of the boat along the canal, or its different 
degrees of velocity, in different depths of water. 
Depths of 
Water. 
ift 
Exp. 
2d 
ditto 
3 ^ 
ditto 
4th 
ditto 
5 th 
ditto 
6th 
ditto 
7th 
ditto 
8th 
ditto 
9th 
ditto 
10th 
ditto 
Mean 
Refults. 
Inches 
H 
u 
Hi 
// 
Hi 
a 
Hi 
11 
Hi 
// 
Hi 
// 
Hi 
n 
Hi 
// 
H 
Hi 
// 
x 4 t 
Hf 
H 
i 4 i 
i 5 
15 
Hi 
H 
15 
Hi 
Hi 
H 
Hi 
H 
H 
Hi 
Hi 
Hi 
Hi 
Hi 
Hi 
Hi 
Hi 
Hi 
Hi 
X S§ 
12 
i6f 
16 
l6 
Hi 
16 
Hi 
16 
16 
16 
16 
16 
1 1 
i6| 
1 7 
17 
i6§ 
i6| 
H 
i6f 
l6 i 
164 
164 
i6| 
10 
17 
18 wind 
17 
Hi 
17 
Hi 
Hi 
H 
H 
Hi 
l 7 i 
9 
»8| 
,81 
iB 
*9 
19 
18 
18 
1 8J 
18 
>81 
i8i 
8 
20 
20 
20j 
20 
20 
20 
20 
Hi 
20 
20 ' 
20 
7 
23! 
23 
22| 
23 
23 
23 
231 
23} 
23 
23 
23 
61 
In the experiments made with this depth of water, the 
boat often touched the bottom. 
30 by 
fuppofitio 
It may be obferved with regard to the laft column of 
the above table, which contains the mean refults or 
mean quantities of time which the boat takes to pafs 
from one end of the canal to the other in different depths 
of water, that it is given for the fake of deftroying thofe 
little differences which are inevitable in practice; and it 
Vol. LXIX. 4 N fhews, 
