pyrometer tle range of which is practically un- for different ranges of temperature, allowing tempera- the soldered seams of the thermic battery constituted limited, has recer tly been designed by Prof. Ch. Féry, tures included between 800 and 4,000 deg. C. to be by the two metallic plates will be… … The Wodal mercury jet interrupter, which we illus- the cone of rays trate herewith, fulfills these requirements in a very striking the _ sol- satisfactory way. The main casing carries at one side dered seam will accordingly be independent of the lying principle on which the apparatus is…
Internet Archive · Public domain (published before 1931). Free to use for anything.
