SPECIAL MACHINERY
For Grinding and Polishing
Manufactured by The Somersworth Machine Co.,
E. R. WARE, Agt.,
| 154 Lake Street, | CHICAGO. |
| Write for Circulars. | |
CALDWELLS CONVEYOR
CALDWELL'S SPIRAL STEEL CONVEYOR,
131-133 West Washington St., Chicago, Ill
ICE-BOATS—THEIR CONSTRUCTION and management. With working drawings, details, and directions in full. Four engravings, showing mode of construction. Views of the two fastest ice-sailing boats used on the Hudson river in winter. By H. A. Horsfall, M.E. Contained in Scientific American Supplement, 1. The same number also contains the rules and regulations for the formation of ice-boat clubs, the sailing and management of ice-boats. Price 10 cents.