Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 214
^ ! Hewas boiling a solution containing saltsof the rare metals, when the liquidboiled over and evaporated on thefibres at theragged end of an asbestoscard, which was used to support the … Fig. 8.—Mr. H. £. Jones, C.E. beaker ; the flame was i)laying roundthe card, and Dr. Welsbach noticedthat tlie salts became luminous. Hedevised a mantle to fit o\er tlie Bunsenburner, and after hard A\ork his re-searches Avcre crowned Mith success. Each time I have been in tliat oldcity A\atching…
Lighting
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
