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? 1780
15.
If you were to agree with C possibly you might
persuade them to let send you go and take a peep
at the Venetian Galleys: when you were so far on
your way, you might stretch on as far as Naples,
& see whether you liked that place better.
I shall send you a copy of Bergman's
in Latin price 7d 8vo and I believe a little tract
of his on the use of the blow-pipe. I think
I may be able to send you a little
acid of sugar discovered by him. Anderson
will get me Schiller's book on first light from Saunders the lecturer & is just coming.
17
I forget whether I mentioned in my last
Fordyce the Bankers Manufactory at
Shields for making Alkali (Barilla)
from Common Salt. I believe he makes
use of clay to diminish the attraction between
the acid and the alk. upon application
of heat, & so drive off the acid. Anderson has
some of the residuum that is left after driving
off the acid. I shall probably send you some.
18. Tourmalin Stones
The summer before last a mine of Tourmalins
was discovered in the mountains of Tyrol
(Pilak's country & Fontana's ) by Müller Counsellor
of the board of Mines & Mint-works
in Transylvania. Swede has just imported an
account of this part translated into French
from Muller's German by one De Launay: of
Bruxelles & presented at Brussels in 1779. pp.
35 4to including the translators' notes. The Tourmalin
you remember properly is a kind
of inferior precious stone which becomes electrical
by being heated, as glass goes by being
rubbed. By applying thin a quantity of "moving
"heat" you precipitate a quantity of the electric
fluid (is that the case?) (if so the electricity
should be negative. Qu) or dispose the stain
to attract a certain quantity of that fluid from
the atmosphere. Hitherto Tourmalins have not
been known to come any where but from
the Dutch Island of Ceylon in the W E. Indies.
Stones which have the electrical property of the
Tourmalin but do not agree with it in some other
properties
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19
I send today May 9th to Raikes to enquire when
Ships go to Petersburgh.
20. Terms v.6.
In case of a rupture between this country
and that, you must not continue in that service. Stipulate
therefore for half-pay during the such war. Do not
engage without written articles signed by C. Ask what
deductions there will be for fees of office. & c & makey
him guarantee you against such deductions. Don't engage in
any expence for them, without writing, for fear of misunderstanding.
21
What you said about my not liking Pet.gh was I hope
ostensible only, not sincere. If she will give me that business
to do, I don't see how it is possible I should
not like it. I could bring more of my ideas to bear there
in a month than here in my whole life. Those are
the only terms, my Sam, upon which we shall ever
meet there. Don't think I can bear to go about to
foreign Courts, dragging about an obscure & insignificant
existence. But more about this in my next.
I have cut to pieces Ingenhouse's book to send you that
part of the Preface which contains a summary of everything
in it that is material. I wish I had done it before. I
fear the Book may have reached you before
now. The book itself will go with your things, and then
you must patch it together again.
18 continued
properties are brought from Brazil Bergman has given
an a chem: analysis of the Tourm. in Memoirs.
Where entire it is brown like rosin, but unlike Muller by cutting
it transversely & obliquely and grinding it as thin as
paper has made it green. This with an account
of the manner of its appearance in the place of its
growth is all there is new in Muller's book. Ergo
I don't send it you.
Don't sell Welch's apparatus so as to lose by it.
If you can not get what it cost, send it back: Sw. desires
you will.
22. Spanish Sheathing Lohmen
Did I tell you in my last that Lohmen send me
in a letter a small specimen of sheathing that was
upon one of the Spanish prizes? I wrote the letter
you desired to him directing it to him on board with
Com. Walsinghame Torbay or elsewhere: but have received
no answer.
23 Dicty Living
Anderson knows a Scotch Parson who will read
a book through & remember it verbatim. Such an
animal might be made of use. D'ailleurs
he is quite
a ninny; as your great memory men frequently are.
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Jeremy Bentham |
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