GENERAL INTRODUCTION have earned. Some of his inventions may be un realisable, but it is hard to find one that is certainly utile. There are faws in his arguments: to state them clearly and fairly is to win the privilege of taking part in a discussion at the Academy W.R. M. LAMB Digitized by Microsoft(RGENERAL INTRODUCTION have earned. Some of his inventions may be uu￾realisable, but it is hard to find one that is certainly futile. There are flaws in his arguments : to state them clearly and fairly is to win the privilege of taking part in a discussion at the Academy. W. R. M. LAMB. 301