| The resulting tungstic acid is dissolved in ammonia, and the ammonic tungstate purified by crystallisation. |
| Next followed the discovery of tungstic acid, and in 1783 he added to his list of useful discoveries that of glycerine. |
| It is marketed either untreated or following thermal decomposition in the form of industrial-quality tungstic oxide. |
| In 1847, Robert Oxland patented in Britain his manufacturing process for sodium tungstate, tungstic acid, and the pure metal, and in 1857, he patented his process for producing tungsten steel. |
| Metallic tungsten may also be obtained by the reduction of tungstic acid, by means of charcoal at a white heat. |
| The molybdic and tungstic acids combine with the soda, forming the respective salts. |
