The scientific papers of Sir William Huggins (1909)
Huggins, William, Sir, 1824-1910, Huggins, Lady, d. 1915 · London, W. Wesley and son · leaf 44
ndto terminate in a graduated head. Behind the slit slides a small shutter which closes the central half of theslit, to protect the part of the plate on which the stars spectrum falls, when,either before or after exposure, narrow comparison spectra are photographedthrough the outer parts of the… … fTWjwo TuBl -cl COLLIMATOR BACX or TELESCOPE Fig. 10. The Tulse Hill Ultra-violet Spectroscope. 24 Scientific Papers In front of the slit extends a tube 12 inches long, furnished at the endwith a sliding diaphragm having an opening of such a size as to exclude alllight except that reflected from…
Astronomy
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