SPECIFICATIONS IN USE. 
13 
its quality, payment will be made therefor at a reduced price, computed under 
the terms of this specification. 
Occasional deliveries containing ash up to the percentage indicated in the 
column of " Maximum limits for ash," on page 4, may be accepted. Frequent 
or continued failure to maintain the standard established by the contractor, 
however, will be considered sufficient cause for cancellation of the contract. 
PRICE AND PAYMENT.' 1 
Payment will be made on the basis of the price named in the proposal for 
the coal specified therein, corrected for variations in heating value and ash, 
as shown by analysis, above and below the standard established by contractor 
in this proposal. For example, if the coal contains 2 per cent, more or less, 
British thermal units than the established standard, the price will ba increased 
or decreased 2 per cent accordingly. 
The price will also be further corrected for the percentages of ash. For all 
coal which by analysis contains less ash than that established in this proposal 
a premium of 1 cent per ton for each whole per cent less ash will be paid. 
An increase in the ash content of 2 per cent over the standard established by 
contractor will be tolerated without exacting a penalty for the excess of ash. 
When such excess exceeds 2 per cent above the standard established, deduc- 
tions will be made from price paid per ton in accordance with following table : 
No de- 
duction 
for lim- 
its be- 
low. 
Cents per ton to be deducted. 
Maxi- 
Ash as established in 
proposal (per cent). 
2 
4 
7 
12 
18 
25 
35 
mum 
limits 
for 
Percentage 
3 of ash in dry coal. 
ash. 
5 
c 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
7- 8 
8- 9 
9-10 
10-11 
11-12 
12-13 
13-14 
14-15 
15-16 
16-17 
17-18 
18-19 
19-20 
20-21 
8- 9 
9-10 
10-11 
11-12 
12-13 
13-14 
14-15 
15-16 
16-17 
17-18 
18-19 
19-20 
20-21 
21-22 
9-10 
10-11 
11-12 
12-13 
13-14 
14-15 
15-16 
16-17 
17-18 
18-19 
10-11 
11-12 
12-13 
13-14 
14-15 
15-16 
11-12 
12-13 
13-14 
12.13 
13-14 
14-15 
15-16 
16-17 
17-18 
18-19 
19-20 
20-21 
21-22 
13-14 
14-15 
15-16 
16-17 
17-18 
12 
13 
7 
14 
8 
14-15 
1.5-16 
16-17 
17-18 
18-19 
19-20 
20-21 
21-22 
22-23 
14 
9 ___ 
15 
10 
16 
11 
16-17 
17-18 
18-19 
19-20 
20-21 
21-22 
22-23 
16 
12_ _ 
17 
13 
18 
14 
19 
15 __ 
19-20 
20-21 
21-22 
22-23 
19 
16 _ _. 


20 
17 
21 
18 
22 
Proposals to receive consideration must be submitted upon this form and 
contain all of the information requested. 
, 7.9tf__ 
The undersigned hereby agree to furnish to the U. S 
building at , the coal described, in tons of 2,240 pounds 
a The economic value of a fuel is affected by the actual amount of combustible matter it con- 
tains, as determined by its heating value shown in British thermal units per pound of fuel, and 
also by other factors, among which is its ash content. The ash content not only lowers the 
heating value and decreases the capacity of the furnace, but also materially increases the cost of 
handling the coal, the labor of tiring, and the cost of the removal of ashes, etc. 
