CLASSIFICATION OF COALS BY RANK: MICROCOMPONENTS IN COAL: SAMPLING: Preparation of a sample for analysis -- COAL TESTING: PROXIMATE ANALYSIS: Moisture -- Ash -- Volatile Matter -- Fixed carbon -- ULTIMATE ANALYSIS: Carbon and hydrogen -- Nitrogen -- Total sulfur -- Oxygen -- CALCULATING COAL ANALYSES FROM AS DETERMINED VALUES TO DIFFERENT BASES: Formulas for converting data -- MISCELLANEOUS ANALYSIS: Chlorine -- Forms of sulfur -- Carbon dioxide in coal -- Calorific value of coal -- Fusibility of coal ash -- Composition of coal ash -- Mineral matter in coal -- Hardgrove grindability index of coal -- Plastic properties of coals -- NEW DEVELOPMENTS IN INSTRUMENTATION FOR ROUTINE COAL ANALYSIS.