EditorialFragment of a Ship Flag, Fragment of the underside of the refraction side of a blue ship's flag: white rectangle with red cross in the upper neck is missing. This is a British blue ship's flag of the period 1630-1707, flag, colors (as symbol of the sta...
EditorialFragment of a Ship Flag, Fragment of the underside of the refraction side of a blue ship's flag: white rectangle with red cross in the upper neck is missing. This is a British blue ship's flag of the period 1630-1707, flag, colors (as symbol of the sta...
EditorialModel of a 30-Pounder Gun, Model of a 30-pound long gun, aimed at a pedestal for instructional purposes. The wooden barrel, 92 cm long and with a caliber of 54.5 mm, is cut in length so that it can be opened to study the soul inside. The two halves are...
EditorialLong-term trip to the Zenith. Sunrise deformed by refraction at 6 o'clock. Morning 10 March 24, 1875, Balloon Zenith on March 24, 1875 at sunrise, Signed: S. T, Fig. 39, p. 155, Smeeton, Burn (sc.); Tilly, Auguste (sc.), 1887, Gaston Tissandier: Histoi...
EditorialZenith long-distance trip, - Sunrise of the moon deformed by refraction, at 8 o'clock. Evening evening March 23, 1875, Balloon Zenith on March 23, 1875, Signed: Tissandier, Fig. 37, p. 152, Tissandier, Albert (del.), 1887, Gaston Tissandier: Histoire d...
EditorialExplanation of Atmospherical Refraction, Astronomical Refraction, no. XCI, according to p. 94, 1842, Charles F. Blunt: The beauty of the heavens: a pictorial display of the astronomical phenomena of the universe. One hundred and four coloured scenes il...
EditorialThe refraction of the eye; including a complete treatise on ophthalmometry; a clinical text-book for students and practitioners : Davis, Achilles Edward, 1866-1941.