‘On behalf of the National Museum I am pleased to formally
acknowledge the receipt of a model oscillating steam engine,
designed by William Graham, Carlisle, Pa., about 1880, which was
brought in person to our division of engineering’.
‘This specimen is an interesting addition to the National
collection where it has been recorded as a gift in your
Very truly yours,
Dec. 12, 1934
J. E. Graf,
Associate Director