When proper care is taken to suit the compound to the water in use, the results secured are fairly effective.

Taking into consideration the plant as a whole, it would appear that the auxiliary machinery, under such conditions, is more efficient than the main engines.

This increase in the amount of work, as was the increase in temperature, is large relative to the additional fuel required as indicated by the total heat.

Before taking any calorimeter reading, steam should be allowed to flow through the instrument freely until it is thoroughly heated.

The latter difficulty is undoubtedly due, in certain instances, to the form of flange in which the strain of the connecting bolts tended to distort the metal.

The specific heat of air at constant pressure varies with its temperature.

If less than this amount of air is supplied, the carbon burns to monoxide instead of dioxide and its full heat value is not developed.

The ratio based on combustible will be greater than the ratio based on fuel if there is unconsumed carbon in the ash.

Gas-house coke is generally softer and more porous than oven coke, ignites more readily, and requires less draft for its combustion.

The heat evolved in burning of a definite weight of standard naphthaline may also be used as a means of calibrating the calorimeter as a whole.