476 Mr Lamplough and Mr Scott, Some further experiments, P| 
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Some further eaperiments on eutectic growth: By F. E. E. 
LampLoueH, M.A., Trinity College, and J. T. Scort, B.A. 
[Read 18 May 1914.] 
The method of “quenching” an alloy during the solidifica- | 
tion of the eutectic has been used to ascertain the character of 
the eutectic during its growth. Resulting from the investiga- | 
tion it has been possible to classify eutectics into two classes, 
(1) those of spherical radiating growth, (2) those exhibiting 
definite crystal contours. The former are always produced when | 
both primaries are of rounded contour, the latter if one primary is | 
of crystal shape. The cause of “halos” surrounding primary | 
erystals has been demonstrated. 
