SPECIFICATIONS IN USE. 
17 
Deductions. — If the coal contains more than 1 per cent moisture, the excess 
per cent above 1 per cent will be deducted from the bill. If the coal contains 
more than 20 per cent volatile carbon, the excess per cent above 20 per cent 
will be multiplied by 2 and deducted from the bill. If the coal contains more 
than 7 per cent ash, the excess per cent above 7 per cent will be multiplied by 3 
and deducted from the bill. 
The following are the essential features of the contracts on which 
a Chicago company is said to purchase and inspect nearly 1,000,000 
tons of coal for its clients in Chicago, Indianapolis, Minneapolis, St. 
Louis, and other cities : 
I. The company agrees to furnish and deliver to the consumer 
at such times and in such quantities as ordered by the consumer for 
consumption at sa'd premises during the term hereof, at the consumer's option, 
either or all of tne kinds of coal described below; said coals to average the 
following assays : 
Of size passing through screen having circular perfora- 
inches 
inches 
inches 
Of size passing over a screen having circular perforations 
Coal of the above respective descriptions and specified assays (not average 
assays) to be hereinafter known as the contract grade of the respective kinds. 
II. The consumer agrees to purchase from the company all the coal re- 
quired for consumption at said premises during the term of said contract, 
except as set forth in Paragraph III below, and to pay the company for each 
ton of 2,000 pounds avoirdupois of coal delivered and accepted in accordance 
with all the terms of this contract at the following contract rate per ton for 
coal of each respective contract grade, at which rates the company will deliver 
the following respective numbers of British thermal units for 1 cent, the con- 
tract guaranty : 
Kind of coal. 
Contract 
rate per 
ton. 
Contract guaranty. 
$ 
equal to net B. t. u. for 1 cent. 


equal to net B. t. u. for 1 cent. 
equal to net B. t. u. for 1 cent. 
Said net British thermal units for 1 cent being in each case determined as 
follows: Multiply the number of British thermal units per pound of dry coal 
by the per cent of moisture (expressed in decimals), subtract the product so 
found from the number of British thermal units per pound of dry coal, mul- 
tiply the remainder by 2,000, and divide this product by the contract rate per 
ton (expressed in cents) plus one-half of the ash percentage (expressed as 
cents). 
III. It is provided that the consumer may purchase for consumption at said 
premises coal other than herein contracted for, for test purposes, it being un- 
