Os? F. a en ne Y [NUMBER 6. VOLUME VII.] Scientific “American, … one time the great advocate of the T rail. place, when exhausted. The kindling and the valve; R is the lever for operating the The accompanying engraving isa view of This is an evidence of a change in his opini- fuel is laid in the fire box ready to be ignited valve of the steam whistle, Q. A is a…
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