Weight of the Trains. English Weight.

SPEED PER HOUR, EXPRESSED IN MILES, Corresponding to the

First

Quarter of a Mile.

Second

Quarter of a Mile.

Third

Quarter of a Mile.

Fourth

Quarter of a Mile.-

Fifth

Quarter of a Mile.

Sixth

Quarter of a Mile.

Tons.

Miles.

Miles.

Miles.

Miles.

Miles.

Miles.

30

18 .85

26.59

26.47

27.82

32 .13

32.62

30

17.95

25.56

26.47

25.10

28.30

30.97

38

18 .10

32.20

28.96

32.20

30.00

28.96

70

13 .37

17.25

19.71

19.28

21.37

20.95

VELOCITIES AT THE DESCENT PRODUCED BY GRAVITY..

30

13 . 69

20.27

22.24

20 . 56

21 .20

21.00

"This table only comprehends six quarters of a mile, or 2413m. 50; the total length of the line being 2787. 70, there remain 374 metres, the velocities of which are not reckoned in the table. These 374m. are at the terminus of the line.

Experiments On The Weight And Speed Of Trains

Weight of the Trains. English Weight.

SPEED PER HOUR, EXPRESSED IN MILES, Corresponding to the

First

Quarter of a Mile.

Second

Quarter of a Mile

Third

Quarter of a Mile.

Fourth

Quarter of a Mile.

Fifth

Quarter of a Mile.

Sixth

Quarter of a Mile.

OBSERVATION's.

Tons.

Miles.

Miles.

Miles.

Miles.

Miles.

Miles.

Weight of the Train.

60. 40

12

20

22

21 . 5

2\ . 5

21

Tons.

7 Passenger Wagons..

25 . 17

5 Wagons for Goods...

27 . 10

Iron in Chains...........

5 . 03

47 Passengers............

3 . 10

60 . 40

70.40

11 . 25

18

19

17 . 6

18 4

16

Wagons as above......

.52 . 27

Iron in Chains............

10 . 03

121 Passengers...........

8 . 10

70 . 40

71 .40

12.00

17

18

15 . 5

16 .6

12 . 5

Wagons as above.......

52 . 27

Iron................................

10 . 03

134 Passengers ........

9 . 10

71 .40

"These last experiments give us information on some points not previously noticed; viz. the height of the mercury in the barometer during the course of the train. For the first it stood at 24 3/4 inches at starting,.and at 23 1/2 at the end of the journey: the second, after having sunk from 21 3/4 to 24 1/4 it rose to 24 3/4°: the third, it sunk from 24 3/4° to 24 inches, and returned to its former level. In each of these experiments the resistance throughout the course was within a little on an equilibrium with the power.