ILLUSTRATIONS. 



Facing page 



The late Lieut. Percival M. Chadwick, B.ISc. (Bond.), 



M.Sc. (Birm.), A.C.S.I., A.M.I.C.E., F.C.L. 24 



The late Charles Baylis Green ... ... ... 25 



The late Sir William Buff Gibbon ... ... 26 



Gnat and Mosquito distinguished ... ... 53 



Magnified Sections of Igneous Rocks ... ... 73 



