Thwaites Brothers, Limited, Bradford, Yorkshire.

[Illustration: FIG. 1.]

[Illustration: SUSPENSION PNEUMATIC POWER HAMMER.]

* * * * *




SIBLEY COLLEGE LECTURES.--1890-91.

BY THE CORNELL UNIVERSITY NON-RESIDENT LECTURERS IN MECHANICAL
ENGINEERING.

COMPRESSED AIR PRODUCTION.

By WM. L. SAUNDERS, C.E., of New York.


I cannot but realize as I stand before you that I would be very much
more at home were I in your midst. I feel but little older and so very
much less wise than when I sat in the class room an undergraduate of the
University of Pennsylvania, that I trust I may expect you to give me
this afternoon, not only your attention, but your sympathy.

The present situation is not without suggestions of my own experience. I
recall a lecture in the ordinary course, given by our professor of
mining, whose struggles with the English language were quite as