INTRODUCTION 



TABLE II. PRODUCTION AND CONSUMPTION OF BASIC SLAG IN THE 

 UNITED KINGDOM. IN METRIC TONS (thousands) 



* Seasonal year June 1st to May 31st. The figures for 1913 to 1920 are taken from 

 the Ministry of Agriculture returns. 



TABLE III. BASIC BESSEMER PROCESS 



TABLE IV. Z 603. ORDINARY BASIC OPEN HEARTH PROCESS 



