Fletcher — A Refined Ifethod of obtaining Sublimates. 463 



The following table represents the sublimates which have so far been 

 obtained in air. The first column shows the colours which prevail when the 

 cover-plate is held close to the carbon ; the second, wlien it is held at a 

 sliort distance away. The first are produced close to, the second farther 

 from, the substance; and hence at intermediate distances " eyes " are produced 

 showing rings of colours with different stages of oxidation from the centre 

 outward. Similar eyes are produced by mixtures, the least refractory 

 constituents tending to spread. Swirling currents tend to mix the colours. 

 The tints described below are those which are observed upon glass or 

 transparent silica by reflected liglit. Different tints are produced upon 

 both glazed and unglazed porcelain, and in transmitted liglit. 



Table. 

 Showing sublimates obtained in air upon glass or transparent silica. 



Natural 

 Families. 



Element. 



The coTer-plate is held 

 close to the substance. 



The cover-plate is held at some 

 distance from the substance. 



II. 



III. 



IV. 



V. 



VI. 



VII. 



VIII. 



( Copper, . 

 { Silver, . 

 ( Gold, . . . 



f Glucinum (Beryllium), 



Magnesium, 

 <, Zinc, 

 I Cadmium, 

 1^ Mercury, 



Aluminium, 

 Indium, . 

 Thallium, 



f Titanium, 

 I Zirconium, 

 ;' Cerium, . 



Silicon, 



I Tin, 

 (_ Lead, 



f Vanadium, 

 I Columbium(Niobium), 

 J Tantalum, 

 1 Arsenic, . 

 I Antimony, 

 L Bismuth, 



Chromium, 

 Molybdenum, 

 Tungsten, 

 Uranium 

 Selenium, 

 ^ Tellurium, 



Manganese, 



Iron, 

 Cobalt, . 

 Nickel, . 

 Rutlienium, 

 .Platinum, 



Dark green or red. 

 Grey- white, 

 Violet to purple. 



Dark, 

 Dark, 

 Dark, 

 Dark, 

 Grey- white. 



Dark, 

 Dark, 

 Dark, 



"White, 



Dark, 



Dark brown, 



Red-brown to ( 



Brown, 



Dark, 



ange 



Brown-black, 



Dark, 



Dark, 



Dark, 



Dark, 



Dark, 



Dark, 



Dark, 



Dark, 



Dark, 



Dark red. 



Dark, 



Dark, 



Dark, 

 Dark, 

 Dark, 

 Dark, 

 Dark, 



Yellow to red -yellow. 



Dull grey, black, some pink. 



Violet to purple. 



White. 



White. 



White. 



Red-brown. 



Grey-white. 



White. 



Cream-white, some pale yellow. 



Red and white. 



White. 



Cream-white. 



White. 



Yellow-white to white. 



White. 



Yellow to light yeUow. 



Yellow-green. 



White. 



White. 



White. 



White. 



Yellow. 



Dull green. 



Yellow-white. 



White. 



Dark. 



Red. 



White and brown-white. 



Light Brown. 



Dark brown-black. 



Dark. 



Dark. 



Dull grey. 



Dark. 



