Word: lensed
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...warm, made it necessary to develop the plates in warm solutions, which often resulted in flukes or distortions in the photographs. Then again, since the cameras were not pointed directly at the starts, but received the solar and star rays by means of mirrors reflecting, the light into the lenses, the images of the stars were subjected to distortions even before they reached the camera lens, because the mirrors expanded or contracted with the slightest change in temperature. A third criticism arose over the method of measuring these plates used by the Greenwich Observatory. to the ordinary individual it would...
...specially constructed cameras were made,--the diameter of the lens being five inches and the focal length 15 feet. These cameras had refracting lenses and were pointed directly at the point in the sky where the eclipse would occur. This avoided any distortions due to expanding and contracting mirrors. The photographic plates were of plate glass and were 17 inches square. The temperate climate of Australia further facilitated matters...
A "micro-vivisection" apparatus so delicate that it enables scientists to dissect living cells has been perfected by Professor C. E. Tharaldsen, of the Department of Zoology, Northwestern University. It consists of a brass lever moved by three finely adjusted screws, manipulating special glass needles which can be brought to...
Mr. Williams spent several months in the spring and summer of 1921 investigating conditions in the coal-mining districts around Lens and Douai in northern France, besides visiting the Saar Valley section. As a part of his investigation he spent ten days working in one of the mines near Lens...
The Biological Club will meet this afternoon at 4.45 o'clock in Room 46 of the Zoological Laboratory. Miss Mary Chambers will lecture on "The Lateral-line Sense Organs of Amiurus, Nebulosus", and Mr. A. J. Lanchner will, review the work of M. F. Guyer on the inheritance of lens...