32 pounds of air contains one pound of O.]

[Footnote 25: Per pound of C in the CO.]

[Footnote 26: Ratio by volume of O to N in air.]

[Footnote 27: Available hydrogen.]

[Footnote 28: See Table 31, page 151.]

[Footnote 29: This formula is equivalent to (10) given in chapter on
combustion. 34.56 = theoretical air required for combustion of one pound
of H (see Table 31).]

[Footnote 30: For degree of accuracy of this formula, see Transactions,
A. S. M. E., Volume XXI, 1900, page 94.]

[Footnote 31: For loss per pound of coal multiply by per cent of carbon
in coal by ultimate analysis.]

[Footnote 32: For loss per pound of coal multiply by per cent of carbon
in coal by ultimate analysis.]

[Footnote 33: The Panther Creek District forms a part of what is known
as the Southern Field; in the matter of hardness, however, these coals
are more nearly akin to Lehigh coals.]

[Footnote 34: Sometimes called Western Middle or Northern Schuylkill
Field.]

[Footnote 35: Geographically, the Shamokin District is part of the
Western Middle Mahanoy Field, but the coals found in this section
resemble more closely those of the Wyoming Field.]

[Footnote 36: See page 161.]

[Footnote 37: U. S. Geological Survey.]

[Footnote 38: See "Steam Boiler Economy", page 47, First Edition.]

[Footnote 39: To agree with Pfaundler's formula the end ordinates should
be given half values in determining T", _i. e._, T" = ((Temp. at B +
Temp. at C) / 2 + Temp. all other ordinates) / N]

[Footnote 40: B. t. u. calculated.]

[Footnote 41: Average of two samples.]

[Footnote 42: Assuming bagasse temperature = 80 degrees Fahrenheit and
exit gas temperature = 500 degrees Fahrenheit.]

[Footnote 43: Dr. Henry C. Sherman. Columbia University.]

[Footnote 44: Includes N.]

[Footnote 45: Includes silt.]

[Footnote 46: Net efficiency = gross efficiency less 2 per cent for
steam used in atomizing oil.

Heat value of oil = 18500 B. t. u.

One ton of coal weighs 2000 pounds. One barrel of oil weighs 336 pounds.
One gallon of oil weighs 8 pounds.]

[Footnote 47: Average of 20 samples.]

[Footnote 48: Includes H and CH_{4}.]

[Footnote 49: B. t. u. approximate. For method of calculation, see page
175.]

[Footnote 50: Temperatures are average over one cycle of operation and
may vary widely as to maximum and minimum.]

[Footnote 51: Dependant upon length of kiln.]

[Footnote 52: Results secured by this method will be approximately