THROUGHOUT the past year it has been my privilege to contribute week by week to these columns a Calendar of Industrial Pioneers. This now comes to an end. This Calendar and the Calendar of Scientific Pioneers, which appeared last year, contain some 930 names, and the lists are believed to be thoroughly representative of that great and ever-increasing army of workers by whom the secrets of Nature are unravelled and natural riches are made available for the benefit of mankind. In selecting the names to be included this year I was assisted by Dr. W. C. Unwin, Professors Eccles, H. C. H. Carpenter and Abell, Mr. F. S. Marvin, and others, and to them I am indebted for suggestions of which I have been glad to make use.