Hydroßatical Tabhs.
H
4 Inches diameter.
4i Inches diameter.
■ »YJrt>
Solidi ty
Weight
In avoir-
n>
Solidity
Weight
j In avoir-
n>
in cubic
in troy
dupoise
S
in cubic
in troy
dupoise
Er
d5‘
Er
inches.
ounces.
ounces.
tr-
0Q*
er
inches.
ounces.
ounces.
I
' T50.8
79-6
87.4
1
190.8
100.7
H0.6
2
301.6
159.2
174.8
2
381.7
201.4
221.2
3
452.4
238.7
262.2
. 3
572.6
302.2
331-8
4
603.2
3 i8 -3
349-6
. 4
763-4
402.9
442.4
. 5
754 -o
497-9
436.9
5
954-3
503.6
553-o
6
904.8
477-5
524.3
6
1145-1
604.3
1 663-6
, 7
1055.6
. 557-r
611.7
7
1337-9
705.0
; 774.2
8
1206:4
636.6
699.1
8
1526.8
805.7
; 884,8
9
1357-2'
716.2
786.5
9
1717-7
906.5
995-4
10
1508.0
795-8
873-9
10
1908.5
1007.2
1106.9
• 20
3 II 5-9
1591.6
1747.8
20
38x7.0
2014.4
2212,1
3°
4523-9
2387.4
2621.7
30
5725.6
3021.6
3818.1
40
6631.9
3183.2
3495-6
40
7634-1
4028.7
4424.1
5°
■ 7539-8
3997.0
43^9-5
50
9542.6
5035-9
553°-i
60
9047.8
4774,8
5243.4
, 60
11451-1
6043,1
6636.2
70
10555.8
5570.6
6117.3
70
13359-6
7050.3
\ 7742.2
80
12063.7
6366,4
6991.2
80
15268.2
8o57-5
8848.2
90
I 357 I -7
7162.2
7865.1
90
17176.7
9064.7
9954-3
100
15079.7
7958. o-
8739.1
100
19085.2
10071.9
11060.3
200
30159 3
15916.0
17478.2
200
38170.4
20143.8
22120.6
any given Cylinder, be divided by 1.8949, it will give the weight introy ounces;, and divided by 1.72556, will give the Weight in avoir-dupoife ounces. By this method* the weights Ihewn in f the tableswere calculate d; and are near enough for any common practice.
The fire-engine comes next in order to be explained : but as it would The firt*be difficult, even by the best. plates; to give a particular description oi en & !m ‘its several parts, so as to make the whole intelligible, I (hall only ex-,plain the principies upon which it is constructed.
1. Whatever weight of water is to be raised, the pump-rod mustbe loaded with weights sufficient for that purpose, is it be Hone by aforcing-pump, as is generally the case: and the power of the enginemust be sufficient for the weight of the rod, in order to bripg.itjup.•