CONTENTS. 
Page. 
Introduction, by Joseph A. Holmes 5 
Washing tests, by G. R. Delamater 8 
Report for 1905 8 
Improvement in equipment 8 
Personnel 9 
Report from January, 1906, to June 30, 1907 9 
Equipment and operation. 9 
Personnel 10 
Explanation of tables 10 
"Percentage of reduction" and "amount actually removed" * 10 
Formulas • 11 
Tests made il 
Coking tests, by A. W. Belden 18 
Equipment 18 
Personnel 19 
Procedure of tests 19 
Extent of tests 19 
Tabulation of results 20 
Descriptions of cokes and remarks 30 
( '< inclusions 45 
Cupola tests of coke, by Richard Moldenke 18 
Equipment IS 
Personnel 18 
Method of testing 48 
Detailed results 19 
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