CONTENTS 
Page. 
Letter op Transmittal 9 
Introduction 1 1 
Organization 11 
Buildings 12 
Equipment 12 
Personnel 15 
Field work L6 
Sampling L6 
Reports 16 
Results 1 (5 
Field Work, by Marius R. Campbell 18 
Introduction 18 
Car samples , 18 
Mine samples 19 
Uninspected car samples 20 
Indian Territory No. 6 20 
Kansas No. 4 20 
Montana No. 1 20 
North Dakota No. 1 20 
North Dakota No. 2 20 
Pennsylvania Nos. 1 and 2 21 
Pennsylvania No. 3 21 
Description of car samples 21 
Work of the Chemical Laboratory, by N. W. Lord . 30 
Introduction 30 
Sampling 30 
Loss on air drying 30 
Methods of analysis 31 
Personnel . . 31 
Analyses of mine and laboratory car samples 31 
Washing Tests, by John D. Wick 60 
Introduction 60 
Special tests 61 
Illinois No. 2 61 
Indiana No. 1 63 
Missouri No. 3 64 
General tests 65 
Alabama No. 1 66 
Arkansas No. 6 66 
Illinois No. 3 66 
Illinois No. 5 <. 67 
Indian Territory No. 2 , 67 
Indian Territory No. 3 68 
Indian Territory No. 5 68 
3 
