SEXTANTS, TELESCOPES, BINOCULAR GLASSES, BAROMETERS, OCTANTS, CHART RULES, CHART DIVIDERS, DRAWING INSTRUMENTS, INCLUDING INSTRUMENTS USED BY MECHANICAL OR SURVEYORS' DRAFTSMEN, AND SUCH INSTRUMENTS AS PLANIMETERS, INTEGRATORS, PANTAGRAPHS, EIDOGRAPHS AND INSTRUMENTS FOR PRODUCING THE PARABOLA, THE HYPERBOLA, CIRCLES AND OTHER CURVES, RULES FOR PRODUCING PARALLEL LINES AND LINES SET AT AN ANGLE, DDAFTING MACHINES, SLIDE RULES, PROTRACTORS, ENGINEERS' AND SURVEYORS' MECHANICAL AND NAVIGATIONAL...