Infinity Internet (EasyStreet) is now Atmosera - Atmosera

Albada, L.E.W. van. A wide-angle stereoscope and a wide-angle view-finder. Transactions of the Optical Society 25:5 (May 1924) 249-260. ... and have the sector lines also : to which is added a rectifying table to find the suns true declination to a minute or two, any day or hour of the 4 years : whereby to find the latitude of a place by ... ................
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