This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1870 Excerpt: ...the measure would appear to be about the same as that in use at the present time. Mr. Berkley"s method for determining when the amount of stretching of any bar was such as to equal the true elastic limit of the iron, was based upon observing the time during the experiment when the elongations ceased to be uniform for equal additions of strain; and this he considered took place when about half the breaking strain was applied. This conclusion, however true it might be, threw no light on the rule of adopting half that strain only as the safe strain in practice. With regard to the proper form for the heads and eyes of 1 Vide " Life of Thomas Telford," 4to., London, 1838, p. 223. suspension lints, in relation to the sectional area of the body of the bar, the experiments recorded in...