Coblentz, W.W. · National Bureau of Standards · leaf 25
t at 1.2/A, 2.5/*, and 4/<i, and minima of55 to 60 per cent at 2/*, 3.3/*, and 6/jl, beyond which point thereflectivity increased gradually to 68 per cent at 9/x. On removingthe rear mirror surface the maxima and minima were destroyed.A second mirror (5 mm x 17 mm), free from dust holes, and… … 5 6 ANTIMONY Fig. 5 In view of the difficulty in producing a mirror which is free fromcarbon, by the cathode discharge, and in view of the fact that themirror seemed darker than one would expect, judging from theappearance of the crystals, it seems probable that the reflectivityis somewhat higher…
