2T8
MOTIVE POWER EMPLOYED
TABLE VIII.
| Velocity in mile* per hour. |
Weight conveyed in cwts.
1 Distance traversed in miles, being that
| which a horse perforins in a day.
-o J;
OS'S
0
— $
v 5 ti“g-X
5 = «S.25
3 i. ’*■
i « j?
jj
v £
(A £
Power which a horse exerts upon the
load from formula —■
V
C
w
o
V
Q,
©
■o
4)
S-*
©■ i
w 5
S 2« —
3 -
s:
©
u
a
s
Z
Weight conveyed in cwts. by a horse400
upon an edgc-rail-road, by formula
Weight which a loco-motive engine willdrag ut>on an edge-rail road in cwts.
Ratio of performance ot a loco-motive
engine and horses, when the speed at
which they travel is the same in each.
Time in hours occupied by horses hitravelling 20 miles, at the respective
, velocities.
Distance in miles which a loco-motiveengine would travel in the preceding
time, going at the rate of 6 m. an hour.
Ratio of distance traversed by loco-I motive engines and horses, in
the same time.
Number of horses’ work which a loco-I motive engine would be continually
j performing in the time-column 10,
travelling at the rate of fi miles an hour,
| and horses at the respective rates of
column 1.
2
800
20
448
112
4
200
800
4:1
10
60
3 : 1
12
3
800
20
448
74f
6
133J
800 6:1
6!
40
2 : 1
12
4
800
20
448
56
8
100
K 8:1
5
30
H:1
12
5
800
20
448
44f
10
80
800 10:1
4
24
11:1
12
6
800
20
448
371
12
6G§
800 12:1
31
20
1 :1
12
The above Table will shew, in a very strikingpoint of view, the rapid increase in the ratioof performance of loco-motive engines, whosepower at all rates of speed is kept the same,over horses, the energy of whose pmver dimi-nishes very rapidly at increased rates of speed ;and this result is not confined to this particularcase alone, but applies equally to every otherspecies of art, where animal and mechanicalaction are brought into competition. Theaction of horses being limited, must ever curband check the advance of any art where, fromnecessity, they are obliged to be employed; but,in the application of mechanical power, there is