| Modulus of Elasticity and Weight of various Substances.[*] | ||
| Substances | Height in Feet. | Weight in Lbs. |
| Brass, yellow | 2 460 000 | 8 464 000 |
| " wire | 4 112 000 | 14 632 720 |
| Elm | 5 680 000 | 1 499 500 |
| Iron, cast | 5 750 900 | 1 796 850 |
| " wrought | 7 555 000 | 25 820 000 |
| " wire | 8 377 000 | 28 230 500 |
| Mahogany | 6 570 000 | 2 071 000 |
| Steel, cast | 8 530 000 | 26 620 000 |
| " wire | 9 000 090 | 28 689 000 |
[*]To Compute the Weight when the Height is given.
RULE.-Multiply the weight of 1 foot in length of the material by the heigh of its modulus in feet, and the product will give the weight.
To Compute the Height of the Modulus of Elasticity.
RULE.-Divide the weight of the modulus of elasticity of the material by the weight of 1 foot of it, and the quotient will give the height in feet.
| Elements connected with the Tensile Resistance of various Substances. | ||
| Substances | Tensile Strain per Sq. Inch for limit of Elasticity | Ratio of Strain to that caus- ing Rupture |
| Beech | lbs. 3355 | .3 |
| Cast iron, English | 4000 | .22 |
| " American | 5000 | .2 |
| Steel plates, blue temp'd | 93720 | .62 |
| " wire | 35700 | .5 |
| Wrought iron, ordinary | 17600 | .3 |
| " wire, No. 9, unannealed | 47532 | .46 |
| " " " annealed | 36300 | .45 |
| Weight of Power required to Tear asunder one Square Inch. | |
| Brass | 42000 |
| " yellow | 18000 |
| [Iron] wrought wire | 103000 |
| " wire, American | 73600 |
| " " " 16 diam. | 80000 |
| [Steel] puddled, extreme | 173817 |
| " American Tool Co. | 179980 |
| Beech | 11500 |
| Elm | 13400 |
| Mahogany | 21000 |
[*] Iron bars when cold rolled are materially stronger than when only hot rolled, the difference being in some cases as great as 3 to 2.
| Result of Experiments on the Tensile Strength of Iron and Steel Wire Ropes. | |||
| Charcoal Iron Wire Rope Circum. | Weight per Foot | Breaking Weight. | |
| Ins. | Lbs. | Lbs. | |
| 1 7/8 | 1/2 | 13440 | |
| 3 3/8 | 1 1/2 | 33800 | |
| Steel Wire Rope Circum. | Stretch in 6 Feet. | Weight per Feet. | Breaking Weight. |
| 1 15/16 | ins. 1 3/8 | 1/2 | 33600 |
| 2 3/8 | 5/8 | 7/8 | 56000 |