Xem 1-4 trên 4 kết quả Photographic plates
  • Hugh McCann took the last of the photographic plates out of the developer and laid them on the table beside the others. Then he picked up the old star charts—Volume 1, Number 1—maps of. This etext was produced from If Worlds of Science Fiction September 1952. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed

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  • Traditionally astrophysics has concerned itself with minimum time-scales measured in hours rather than seconds. This was understandable as the available recording media were slow; e.g. chart recorders and photographic plates. In the 1950s, 60s and 70s wavebands away from the optical were developed; from ground based radio studies to space and balloon borne high energy work. In contrast to optical wavelengths instrumentation in these (high and low energy) regimes was capable of time resolutions of less than a second....

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  • The Observatory's suite of technical equipment is complemented by a Library and Archives that is one of the premier specialist collections of its kind in the UK and Ireland. The library, archives and museum collection together comprise a unique and growing collection of historic books and manuscripts, as well as images, photographic plates, scienti c instruments, clocks and other artefacts concerning the development of astronomy in the UK and Ireland over more than two hundred years. These rank amongst the leading collections of their kind in the UK and Ireland.

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  • The collection of photographs from which the plates in this and the February number were selected was only recently made under the direction of Signor Boni, an official of the Italian government, charged with the care and restoration of historic monuments. The province of Apulia has been so little invaded by the march of modern improvement, and its present inhabitants are, as a rule, so poor, that it is difficult to travel here except on the line of a few main thoroughfares, and strangers seldom visit more than one or two of the principal towns on the coast. Bari...

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