448

EXPERIMENTAL INQUIRIES ON

Cwt.

12 .

Inch.

. -12

19J.

24 .

. -35

31£.

. -82

36 .

38 J.

The bar cracked suddenly, and continued to support theweight sixteen hours, the crack having considerably in-creased. The weight of the bar was 33 lbs.

Experiment 54.

A plate of iron 3^ inches deep, and 1^ inch thick, 7 feetlong, and 4 feet 6 inches between the bearings, was keptvertical by angle-iron riveted over the bearings. It failed,however, by twisting sideways with 1 ton 16 cwt.

The deflection was as follows: —

Cwt.

Inch.

Cwt.

Inch.

3 .

. -01

13 .

.. 44

4 .

. -02

14 .

.. 45

5 .

. -04

15J.

. 49

6 .

. -06

16J.

.. -21

7 .

. -08

17£.

.. -22

8 .

. -095

18J.

. -23

9 .

. -1

194.

.. -24

10 .

. 41

Increased in 16 hours ..

.. -27

11 .

. 43

31 .

. -33

12 .

. 44

36 .

..1-2

The plate buckled sideways, and the weights wereremoved.