138 
SUMMARY OF CURRENT RESEARCHES. 
tions of pure gold prepared by Osmond and Roberts- Austen,* one of 
which is reproduced in fig. 13. When the proportion of antimony is in- 
creased above 50 per cent., a eutectic magma shows no signs of reappear- 
ing. Similarly in the tin-antimony series, there is evidence of a com- 
pound containing 20 per cent, antimony and isomorphous with silver, 
and in the silver-tin series a compound containing 30 per cent, of tin 
also appears to be isomorphous with silver. An investigation of the 
triple alloys of these metals would be interesting, as probably affording 
fresh examples of isomorphous series.” 
* Osmond and Roberls-Austen, 1 On the Structure of Metals, its Origin and 
Changes,’ Phil. Trans., clxxxvii. (1896) A, pp. 417-32. 
