Technikatörténeti szemle 10. (1978)

A MÉRÉS ÉS A MÉRTÉKEK AZ EMBER MŰVELŐDÉSÉBEN című konferencián Budapesten, 1976. április 27–30-án elhangzott előadások II. - Fodor P.–Kertai M.–Pólos L.: Atomabszorpciós méréstechnika és a környezetvédelem

0. The arachne, measurement of a star's angular distance from the horizon 6. The celestial sphere with observer at O, horizon (HH), diameters of the winter tropic (WW), equator (EE') and summer tropic (SS'), declination of the equator to the horizon at the equinox (a), the auxiliary rectangular triangle which Eudoxus probably used (SOP') and which determines the value given to the obliquity of the ecliptic (a), half the night arc (/?) corresponding to the division of the summer tropic on the point Q in the ratio 5:3 (i.e. K

ss

) = 5:3) at the summer solstice. Parts of the diagram below the horizon marked with dotted lines 7. The arachne, the division of the tropic by the horizon at the summer solstice (a :b)