THE CONSTITUTION OF THE COPPER-TIN SERIES OF ALLOYS. 
69 
experiments. Mr. Fearnsides took many of the more difficult photographs, and 
carried out many of the tedious experiments on the slow cooling and chilling 
of the alloys. 
During the coni'se of the research Professor Bakhuis Roozeboom was kind enough 
to write tn us several encouraging and instructive letters on the theory of the 
subject, and we wish here to express our gratitude to him. 
We have also had help and encouragement fi'om the late Sir Geokge Stokes. 
