Plans were also
furnished by him at the request of the Government, for deepening the
mouth of the Panuco River upon which is located the city of Tampico, the
Gulf terminus of the Mexican central railway system.--_Engineering._
* * * * *
COST OF POWER TO MAKE FLOUR.
The following estimate of the cost of the power required to manufacture
a barrel of flour is taken from the _Miller_. The calculation would
hardly hold good in this country owing to difference in cost of fuel
attendance etc., but is nevertheless of interest.
"The cost of a steam motor per 20 stone (280 lb.) sack of flour depends
entirely on local circumstances. It depends first, on the amount of
power expended in the production of a sack of flour, that is on its mode
of manufacture, and it depends, secondly, on the cost of the necessary
amount of power, that is, on the cost of fuel burned per horse power The
average consumption of coal of first class steam engines may be taken at
2 lb. per hour per indicated horse power.
"Supposing a mill with six pairs of stones, two pairs of porcelain
roller mills, and the necessary dressing, purifying, and wheat cleaning
machinery to require a steam motor of 100 indicated horse power to drive
it, then the average consumption of fuel in this mill would be 200 lb.
of coal per hour. Such a mill working day and night will turn out about
400 sacks of flour per week of, say, 130 hours, so that 200 X 13 =
26,000 lb.
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