filled with mercury to trivance which would infallibly indicate the presence and denser one, as water. The pickerel loves to sun himself ly- within a sixteenth or thirty-second of an inch from the progress of a leak would be of great value onfall water craft. ing in shallow water, j ust beneath the… … beneath it, pushed by a screw in the base of the instrument. future apprentice and workman—should thus prepare him- I Fiy. 2 self for his course and make his way, as a learner, easier. No M3.l Our two engravings show such a machine which does not means to an end should be despised because of its…
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