245 



of coke, skillfully made from selected coal beds, have not until recently 

 been fully understood. 



I may venture to predict that the^time is not far oQ] when coke, ' 

 now so extensively used as a propelHng power and for manufacturing 

 purposes, will be universally substituted in the place of coal, properly 

 made, for domestic use, on account of its cleanhness, durability and 

 economy. 



In England, Scotland, Ireland, and North Wales, (accerding to M. 

 Dunn's statistical tables,) there are worked — 

 103 seams of 3 feet coal. 



60 « of 2 " 

 160 " of between 2 and 3 feet. 



The following estimate is [on the employment of 42 two-horse teams, 

 over the plank road, for the transportation of coke : 



Steam engme, pump, and fixings, $5,000 



Stables, sheds, oflSces, and scales, 2,000 



Ten coking ovens at $150, 1,500 



$8,500 



Forty-two wagons at $150, $6,300 



Eighty-four horses at $100, 8,400 



Forty-two sets of harness at $20, 840 



Forty-two pairs storm covers at $4, 168 



$15,708 



ANNI'AL EXPENSES. 



Wear of 20 per cent, on $15,708,.. $3,411 



Rent of coal yard at Detroit, 50O 



Salary of Superintendent, 600 



Coal yard agent, at $30 per month, 360 



Four laborers at coal yard, at $20 per month, 960 



Contingency of 10 per cent, on $8,500 850 



6,411 



Hay, 14 lbs. a day for each horse, 215 tons, at $6, 1,290 



Oats, 20 quarts " '• « 19,167 bushels, at 35c, 6,708 



Oil for wagoiLs and harness, . $60 



Curry-combs and whip lashes, 40 



100 



Horse shoeing, $10 per horse, 840 



Forty-two wagon-masters, at $20 per month, 10,080 



