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depth will be as two pumps. but this will be nothing to be considered for
the purpose in question. The pipe extends 35 fathom deep each perhaps of my English feet.
but the solution of salt rises of itself to within 11 fathoms, by the purpose of the
atmosphere it may rise 4 fathoms more the pistons then need not
and do not work much deeper than 7 fathoms. The double part of
the pumps then need be but 7 out of the 35 fathoms deep; and to that
depth the hole in the ground is always made of that size as might well
contain the double pipe proposed. — you will see then that thus twice
the quantity may be raised and that for this I have no need of the table
I speak of, but if I do give the plan for any alteration in a machine
I would wish to make it in all respects as perfect as I can.
This pump matter is of no such great importance, it is applicable
to the salt works only. What with respect to these said salt works is a matter
of great importance is the getting rid of the superabundant water so as to make the
salt chrystalize This is done by boiling only and with an immense waste of fuel the heat of
the Sun will do little here and though it has not been tried yet I do not believe that
if the solution were put in circumstances favourable to make it freeze in winter; it would
made avail. 1r The solution is at present so concentrated that little water would be
frozen. 2dly it is not for 2 months in the year that hard frosts can be expected.
However by an economy of heat in boiling & possibly by blowing a current of air
artificially heated on the surface during the boiling I flatter myself I could produce
the same effect with 1/2 the quantity of fuel. This would be an advantage
to the proprietor to the amount of about 30, thousand pounds sterling a year: according
to the conditions mentioned in the other half sheet, the profit to the introducer of such an improvement
could amount in the 10 years to 100,000£. suppose the improvement to be practicable but in half
the degree, half the above sum is no trifle.
Another matter I want to accomplish but which requires more consideration and experience than
I as yet can have is to make the heat which flies off from a melting furnace and for the smelting
copper or iron ones which work by means of a Steam Engine the bellows which promote the sufficient heat.
1er whether a heat can be produced sufficient for the smelting copper one without bellows or if it can
rather iron one (with respect to copper one in England & other parts it is done) is a matter of doubt. but say I
if bellows are necessary the heat which flies off from the furnace is sufficient to work a steam Engine with
any more heat which steam Engine shall waste move the bellows. Such furnaces then may be constructed anywhere: at
present it does not enter peoples heads here that a furnace can be built where there is no waterfall to work the bellows.
solution
arises thus far
itself.
The reason of making this pipe go so deep is that
the solution is stronger.
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Identifier: | JB/539/280/002 "JB/" can not be assigned to a declared number type with value 539.
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1782-01-2 |
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539 |
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280 |
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002 |
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Correspondence |
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Samuel Bentham |
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