 | 1871 - 816 pages
...of the vanadic acid with the highest oxides of phosphorus and arsenic ; and stated, in conclusion, that vanadium, hitherto standing in no definite relation to other elements, must now be regarded as a member of the well-known triad class of elementary substances, comprising nitrogen,... | |
 | Royal Institution of Great Britain - 1869 - 652 pages
...the wefl-known TrivsI¿ or Triad class of elementary substances, comprising nitrogen, pkia phorus, boron, arsenic, antimony, and bismuth. It is true that we are still but imperfectly acquainted with ¿ of the characters of vanadium, but the more its nature is studied, t¿ more J)OifltS of family resemblanco... | |
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The speaker stated that the foregoing facts clearly pointed out that vanadium, hitherto standing in no definite relation to other elements, must be regarded as a member of the well-known Trivalent or Triad class of elementary substances, comprising nitrogen,... 
