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<p> piled up above in a conical form also, so as that the whole mass makes a double <lb/> cone joined at the bases. The heap is made as compact as possible by taking care<lb/> to arrange the pieces side by side so as to leave no considerable vacancies. It is then <lb/> set on fire all round and <del> made to burn</del> is kept from burning too fast by beating <lb/> it down so as perhaps for the burning to continue a week. <del>in</del> This oily matter is <lb/> separated by the heat or at least by the burning and falling down to the point at <lb/> bottom, there runs into casks or other vessels for the reception of which a hole<lb/> is made still deeper. Tar is made <add> but</add> from the roots <add> only </add> of the <del>fir</del> common fir of this <lb/> country in the same manner. Qu: is it <del>the</del> by the operation of burning that <lb/> the <gap/> is formed or is it separated only by that degree of heat? If the latter<lb/> be the case it would be better that it should not burn at all but be decomposed<lb/> in ovens where there is no circulation of air. The carbon and potash <lb/> <sic>manufacturies</sic> should then be together the burning of the latter being made<lb/>to produce the heat for separating the former. This to be sure is an <lb/> experiment which one may try in an hour.</p> <pb/> <p> I have written to my father by this post. I shall possibly write to you <lb/> again next post or the post after, and before long as a messenger will be <lb/> dispatched from here I hope to give you something which I had rather not <lb/> write by the post.</p> <p> St Petersburg 21 Nov<hi rend="superscript">r</hi> OS 1789. Write to me often<lb/> I beg & pray Will Wilson never write me any more news.<lb/> How & what does Lind do? </p> | |||
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piled up above in a conical form also, so as that the whole mass makes a double
cone joined at the bases. The heap is made as compact as possible by taking care
to arrange the pieces side by side so as to leave no considerable vacancies. It is then
set on fire all round and made to burn is kept from burning too fast by beating
it down so as perhaps for the burning to continue a week. in This oily matter is
separated by the heat or at least by the burning and falling down to the point at
bottom, there runs into casks or other vessels for the reception of which a hole
is made still deeper. Tar is made but from the roots only of the fir common fir of this
country in the same manner. Qu: is it the by the operation of burning that
the is formed or is it separated only by that degree of heat? If the latter
be the case it would be better that it should not burn at all but be decomposed
in ovens where there is no circulation of air. The carbon and potash
manufacturies should then be together the burning of the latter being made
to produce the heat for separating the former. This to be sure is an
experiment which one may try in an hour.
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I have written to my father by this post. I shall possibly write to you
again next post or the post after, and before long as a messenger will be
dispatched from here I hope to give you something which I had rather not
write by the post.
St Petersburg 21 Novr OS 1789. Write to me often
I beg & pray Will Wilson never write me any more news.
How & what does Lind do?
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Identifier: | JB/539/112/002"JB/" can not be assigned to a declared number type with value 539. |
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1780-12-02 |
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539 |
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112 |
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002 |
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Correspondence |
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Samuel Bentham |
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