Observations on the rare earths : yttrium chloride and the atomic weight of yttrium . chloride by heating the hydrate in a current of dry hydroohloric acid gas at 0 27 ) 0 180 . He desoribes the anhydrous chloride as fusing at about 686 and giveso o the density at 18 /4 as The method used for drying the chloride was based on Matignons method and was carried out practioally the same as the process described by Baxter38 ) and Chapin in the preparation of anhydrous neodymium chloride. Hydrochloric aoid gas was generated by the action of concentrated sulphur-io aoid on concentrated hydrochlor
Observations on the rare earths : yttrium chloride and the atomic weight of yttrium . chloride by heating the hydrate in a current of dry hydroohloric acid gas at 0 27 ) 0 180 . He desoribes the anhydrous chloride as fusing at about 686 and giveso o the density at 18 /4 as The method used for drying the chloride was based on Matignons method and was carried out practioally the same as the process described by Baxter38 ) and Chapin in the preparation of anhydrous neodymium chloride. Hydrochloric aoid gas was generated by the action of concentrated sulphur-io aoid on concentrated hydrochloric acid and was dried by passage through twotowers about one meter high and two and one half oentimeters in diameter fill-ed with glass beads over which trickled concentrated sulphuric aoid. Nitrogen was prepared by passing air through concentrated ammonia andthen over hot copper slugs in a quartz tube. It was purified and dried bypassing through dilute sulphurio aoid, silver nitrate solution, concentratedsulphuric aoid, and over solid potassium hydroxide, and then through a tower. -17- similar to those described above but only one half meter high, and finallythrough a phosphorus pentoxide tube. Air was purified and dried in a similartrain omitting the ammonia and copier treatments. The apparatus for dryingthe gases was composed entirely of glass and was so arranged that either hydrogen ohloride, nitrogen, air or a mixture of hydrogen chloride and nitrogencould be passed through the apparatus as desired. In the first experiments the ohloride to be dehydrated was contained ina quarts boat whioh had previously been weighed in a weighing bottle. Theboat and contents were then heated in a Jena glass tube which formed part ofa Richards bottling apparatus. However, it was found that the ohloridecould not be heated to a sufficiently high temperature in this apparatus toinsure perfect dehydration because of the softening of the glass tube and thedanger of contamination through aotion o
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
