Srientific American, 133 AUGUST 30, I 873.| governor is invariably attached. The very excellent prac- main building, is to many one of the most interesting ob- … unite the cylinder and jacket; but there is no excuse for PORTABLE ENGINES, THE GREAT EXPOSITION—LETTER FROM UNITED STATES carelessness in covering the boiler and the steam cylinder a branch of steam engine construction, in which, as in com- COMMISSIONER PROFESSOR. R. H. THURSTON. with protectors…
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