Measurement apparatus and equipment including those for scientific, nautical, thopographie, meteorologie, industrial and laboratory purposes being thermometers, not for medical purposes, barometers, ammeters, voltmeters, hygrometers, testing apparatus not for medical purposes in the nature of telescopes, periscopes, directional compasses, speed indicators, laboratory apparatus, microscopes, magnifying glasses, stills, ovens and furnaces for laboratory experiments; apparatus for recording, tra...