Stars and telescopes; a hand-book of popular astronomy founded on the 9th ed. of Lynn's Celestial motions (1901)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911 · Boston, Little, Brown · leaf 330
attention to these critical researches, de-termining many stellar parallaxes with high precision, and hiswork was ably continued at Dunsink for several years by SirROBERT Ball. Their measures were made with the microme-ter (page 343), and the mathematical formula; requisite incalculating such… … Dr GILLS HELIOMETER AT CAPETOWN (Aperture, 6 inclus. Built by Repsold of Hamburg in 1888, and chiefly used in deter-mining- distance 0/Sun and stars. Instruments of this type in the hands 0/ trainedobservers have given results 0/ the highest precision yet reached in astronomicalmeasurement) 278…
Astronomy
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