Physical apparatus and instruments.
See also Astronomical instruments. Nautical instruments. Chemistry. Apparatus. Optical instruments. Electrical apparatus. Physics. Laboratory manuals. Gauges. Surveyors’ instruments. Meteorological instruments. Time-keepers. Meters.
And
Names of special instruments: as,
Chronograph. Scales. Noddy. Spectroscope.
This card was printed at the Boston ae Public Library, Aprit 2, 1928.
N4628 Os.