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are raised in this classification to bituminous rank. Coals of higher rank,
that are marginal between bituminous and semi-anthracite, are delimited
according to their agglomerating properties. Coals that have the other
properties of semi-anthracite but show agglomerating properties are
lowered in classification to low volatile bituminous coal, the highest group
of the bituminous class. Full particulars of this system appear in a report
on “The A.S.T.M. [American Society Testing Materials] Standard Speci-
fications for Classification of Coals by Rank and by Grade and their Ap-
plication to Canadian Coals’’, issued by the National Research Council
as N.R.C. (National Research Council) Report No. 814 (1939). The
classes and groups and their delimiting factors according to the A.S.T.M.
system of classification by rank are indicated in Table III. Under this
system, the rank of all coal seams in the Gething formation in the Peace
River Foothills falls into either the low volatile bituminous or the medium
volatile bituminous group.

Tasie IIT

Classification of Coals by Rank
(A.S.T.M. Designation: D.388-38)-1937

Limits of fixed carbon Requisite
Class Group or B.t.u. mineral- physical
matter-free basis properties
Anthracite Meta-anthracite Dry F.C., 98 per cent or/Non-agglomerate?
more.
Anthracite Dry F.C., 92 per cent or
more and less than 98
per cent.
Semi-anthracite Dry F.C., 86 per cent or|
more and less than 92
per cent.
Bituminous* Low volatile bitu-|Dry F.C., 78 per cent or|/Hither agglomerate or
minous coal more and less than 86] non-weathering®
per cent.
Medium volatile Dry F.C., 69 per cent or
bituminous coal more and less than 78
per cent.
High volatile A Dry F.C., less than 69 per
bituminous coal cent and moist® B.t.u.
14,000° or more.
High volatile B Moist? B.t.u. 13,000 or|
bituminous coal more and less than
14,000.
High volatile C Moist B.t.u. 11,000 or
bituminous coal more and less than
13,000.°
i i b-bituminous A |Moist B.t.u. 11,000 or/Both weathering and
Sr tas ii Sos more and less than] non-agglomerate®
13,000.°
Sub-bituminous B |Moist B.t.u. 9,500 or
coal more and less than
11,000.®
Sub-bituminous C |Moist B.t.u. 8,300 or
coal more and less than
9,500.5

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