d ball race, rests by disks. The plunger can be set opposite any of the in the compass card of the chart. The compass card means of bicycle balls upon this, forming the perma- four by hand, according to the kind of circle to be of the chart is more important to the sailor than the cut, whether… … the work is inspected and tested, Adaptation of the Pantograph, a Device for Engraving Sounding Depths Upon Charts, A pawl 21 engages with the tested and inspected, many front of car- times, before riage. In the the chart is return of the en- finally printed. graving stroke, These cards the…
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Internet Archive · Public domain (published before 1931). Free to use for anything.
