Leroy, Arthur, 1851-1902.
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Leroy, Arthur, 1851-1902.
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Leroy, Arthur, 1851-1902.
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Subjects
Achromatism
Astigmatism
Astronomical instruments
Batteries (Ordnance)
Circle (Analytic geometry)
Converging lenses
Diffraction
Electric coils (Physics)
Electricity
Electric resistance
Electrooptics
Galvanometer
Inventions (Patents)
Lenses (Optics)
Lighting (Technology)
Magnetism
Ophthalmic lenses
Ophthalmology instruments
Optical glass
Optical instruments
Optometry
Photometry
Physical optics
Physiological optics
Sharpshooting (Military Science)
Spectrum analysis
Stellar chromospheres
Telephone (Technology)
Telescopes