Coblentz, W.W. · National Bureau of Standards · leaf 27
ry) polishing the surface on chamois skin with a little puttypowder. This procedure prevented the formation of a film ofoxide. However, the surface was not entirely free from blisters,so that the reflectivities are somewhat higher than recorded inFig. 6, Mg. The reflectivity curve is somewhat… … 2345678 9/A RHODIUM, IRIDIUM, IRON, MAGNESIUM, CHROMIUM Fig. 6CHROMIUM The sample of chromium was sawed from a lump of the metalmade by the Goldschmidt process. The material was quitecrystalline, but took a fairly high polish, excepting the usualpores which were rather large as compared with those…
