38|.47|.52|.56|.58|.60|.63|.64|
|3200 | | | | | | | | | | |.45|.51|.55|.58|.60|.63|.64|
|3300 | | | | | | | | | | |.44|.50|.54|.57|.59|.62|.64|
|3400 | | | | | | | | | | |.42|.49|.53|.56|.59|.62|.64|
|3500 | | | | | | | | | | |.40|.48|.52|.56|.58|.62|.64|
|3600 | | | | | | | | | | | |.47|.52|.55|.58|.61|.63|
|3700 | | | | | | | | | | | |.45|.51|.55|.57|.61|.63|
|3800 | | | | | | | | | | | |.44|.50|.54|.57|.61|.63|
|3900 | | | | | | | | | | | |.43|.49|.53|.56|.60|.63|
|4000 | | | | | | | | | | | |.42|.48|.52|.56|.60|.62|
|4100 | | | | | | | | | | | |.40|.47|.52|.55|.60|.62|
|4200 | | | | | | | | | | | |.39|.46|.51|.55|.59|.62|
|4300 | | | | | | | | | | | | |.45|.50|.54|.59|.62|
|4400 | | | | | | | | | | | | |.44|.49|.53|.59|.62|
|4500 | | | | | | | | | | | | |.43|.49|.53|.58|.61|
|4600 | | | | | | | | | | | | |.42|.48|.52|.58|.61|
|4700 | | | | | | | | | | | | |.41|.47|.51|.57|.61|
|4800 | | | | | | | | | | | | |.40|.46|.51|.57|.60|
|4900 | | | | | | | | | | | | | |.45|.50|.57|.60|
|5000 | | | | | | | | | | | | | |.44|.49|.56|.60|
+-----+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+

FOR OTHER STACK TEMPERATURES ADD OR DEDUCT BEFORE MULTIPLYING BY
HEIGHT / 100 AS FOLLOWS[52]

For 750 Degrees F. Add .17 inch.
For 700 Degrees F. Add .14 inch.
For 650 Degrees F. Add .11 inch.
For 600 Degrees F. Add .08 inch.
For 550 Degrees F. Add .04 inch.
For 450 Degrees F. Deduct .04 inch.
For 400 Degrees F. Deduct .09 inch.
For 350 Degrees F. Deduct .14 inch.

[Graph: Horse Power of Boilers against Diameter of Stack in Inches

Fig. 33. Diameter of Stacks and Horse Power they will Serve

Computed from Formula (28). For brick or brick-lined stacks, increase
the diameter 6 per cent]

Height and Diameter of Stacks--From this formula (27) it becomes evident
that a stack of certain diameter, if it be increased in height, will
produce the same available draft as one of larger diameter, the
additional height being required to overcome the added frictional loss.
It follows that among the vario