B

THERMOMETERS, INSTRUMENTS FOR ANALYZING FLUE GASES, INSTRUMENTS FOR TESTING THE CHEMICAL TEMPERATURE AND PRESSURE CONDITION OF GASES PRODUCED BY FUEL BURNERS, INSTRUMENTS FOR MEASURING ENGINE CYLINDER PRESSURES, INSTRUMENTS FOR TESTING ENGINE INJECTOR NOZZLES, AND SIMILAR INSTRUMENTS FOR INDICATING AIR VELOCITY IN AIR CONDITIONING AND VENTILATING SYSTEMS, FOR PRODUCING PRESSURE-TIME DIAGRAMS FOR HIGH-SPEED ENGINES, FOR PRODUCING PRESSURE VOLUME DIAGRAMS FOR DIESEL ENGINES, FOR MEASURING STACK TEMPERATURES IN FLUE GAS CHIMNEYS, FOR MEASURING THE CONTENT OF SOLIDS IN FLUE GASES FOR BOTH DOMESTIC AND COMMERCIAL USE