material, though possessing a high tensile strength, was in every way
suitable for the construction and endurance required in crank shafts.

Sheet No. 1 shows you some particulars of these tests:

Tensile Elong. Fractured Broke Fall
Tons. in 5" Bend. Blows. Blows. In.
A = 30.5 28 p. c. Good 61 78 12

In order to test the comparative value of steel of 24¾ up to 35 tons
tensile strength, I had several specimens taken from shafts tested in
the manner described, which may be called a _fatigue_ test. The
results are shown on the same sheet:

B = 24½ Good 64 72 7
B -- -- -- 48 54 12
C = 27 25.9 p. c. Good 76 81 12
D = 29.6 28.4 p. c. Good 71 78 12
E = 30.5 28.9 p. c. Good 58 77 12
F = 35.5 20 p. c. Good 80 91 12

The latter was very tough to break. Specimen marked A shows one of
these pieces of steel. I show you also fresh broken specimens which
will give you a good idea of the beautiful quality of this material.
These specimens were cut out of shafts made of Steel Co. of Scotland's
steel. I also show you specimens of cold bending:

Tensile Elong. Fractured Broke Fall
Tons. in. 5" Bend. Blows. Blows. In.
G = 30.9 27½ p. c. Good 59 66 12