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A series of astronomical and some laboratory tests were made with the Bendix-Friez Lumicon during the period December 1958 to July 1959 at the Yerkes and McDonald Observatories. The object of these tests was to assess the suitability of the Lumicon as a tool for astronomical research, including the discovery and observation of artificial satellites. The Lumicon was equipped with a General Electric No. Z-5294 Image Orthicon. Relevant notes, comments, and recommendations are given which may assist in further tests or in future developments of the apparatus. Three series of astronomical tests were run: (1) at Yerkes Observatory during December 1958 and January 1959; (2) at McDonald Observatory during March 1959; and (3) at Yerkes Observatory during July 1959. The Yerkes tests included observations of the Moon, Venus, Mars, Jupiter, Saturn, star fields, and nebulae, with the 40-inch telescope. Further, tests with three short-focus, wide-angle lenses, for the recording of stars to the limiting magnitude, both for stationary star fields and fields moving at the rate of 1 degree per second (typical satellite velocity). The McDonald tests included similar observations with the 82-inch reflector, placed at 6800 feet elevation, and with two of the three short-focus lenses.

1Elsje

By A. C. Kuiper

Elsje, een 14 jaar oud weesmeisje, woont gelukkig bij haar grootmoeder op het platteland. Omdat de gezondheid van de grootmoeder achteruitgaat moet ze gaan wonen in de stad bij haar deftige tante en egoïstische nichtje. Het simpele boerenmeisje moet een deftig dametje worden en dat gaat niet zonder slag of stoot. Samenvatting geschreven door Marcel Coenders.