1911-12.] Note upon the Structure of Ternary Alloys. 
39 
DESCRIPTION OF FIGURES. 
Fig. 1. Tin-bismuth alloy, containing 40 per cent, of tin and 60 per cent, of 
bismuth, etched with nitric acid. White primary crystals of bismuth, with fringed 
borders. Magnified 100 diameters. 
Fig. 2. Lead-tin-bismuth alloy, containing 15 per cent, of lead, 15 per cent, of tin, 
and 70 per cent, of bismuth, etched with nitric acid. Large white primary crystals 
of bismuth, smaller secondary growth of bismuth and tin, ground mass of ternary 
eutectic. Magnified 50 diameters. 
(Issued separately February 16, 1912.) 
