9|31.72|31.66|31.61|31.56|31.51|31.47|31.44|31.40|31.37|31.35|31.32|31.29|31.27|31.25|31.23|31.21|31.19|31.18|31.16|
170 |32.18|32.10|32.02|31.96|31.91|31.86|31.81|31.77|31.73|31.70|31.67|31.64|31.62|31.59|31.57|31.54|31.52|31.50|31.49|31.47|31.46|
180 |32.49|32.41|32.33|32.27|32.22|32.16|32.12|32.08|32.04|32.00|31.97|31.95|31.92|31.89|31.87|31.84|31.82|31.80|31.79|31.77|31.75|
190 |32.81|32.72|32.65|32.59|32.53|32.47|32.43|32.38|32.35|32.32|32.29|32.26|32.23|32.20|32.17|32.15|32.13|32.11|32.09|32.07|32.05|
200 |33.13|33.05|32.97|32.91|32.85|32.79|32.75|32.70|32.66|32.63|32.60|32.57|32.54|32.51|32.49|32.46|32.44|32.42|32.40|32.38|32.36|
210 |33.47|33.38|33.30|33.24|33.18|33.13|33.08|33.03|32.99|32.95|32.92|32.89|32.86|32.83|32.81|32.79|32.76|32.74|32.72|32.70|32.68|
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The proper consideration can be given to the adaptability of any boiler
for the service in view only after a thorough understanding of the
requirements of a good steam boiler, with the application of what has
been said on the proper operation to the special requirements of each
case. Of almost equal importance to the factors mentioned are the
experience, the skill and responsibility of the manufacturer.

With the design of boiler selected that is best adapted to the service
required, the next step is the determination of the boiler power
requirements.

The amount of steam that must be generated is determined from the steam
consumption of the prime movers. It has already been indicated that such
consumption can vary over wide limits with the size and type of the
apparatus used, but fortunately all types have been so tested that
manufacturers are enabled to state within very close limits the actual
consumption under any given set of conditions. It is obvious that
conditions of operation will have a bearing on the steam consumption
that is as important as the type and size of the apparatus itself. This
being the case, any tabular information that can be given on such steam
consumption, unless it be extended to an impracticable size, is only of
use for the most approximate work and more definite figures on this
consumption should in all cases be obtained from the manufacturer of the
apparatus to be used for the conditions under which it will operate.

To the steam consumption of the main prime m