*94-
Regmim fùb-
terraneum,
P* *HTHe
medal,
Or Lykken
copper-work.
N A T U R A T H I S T O R Y o ll.A T 0 M WAT
of the ore requires a frefh frre, fix, fegeh/or.vei^t
there are in this place, which 'not- v-^-'long fesce was a wild de-^
fert, great numbers who now earn a comfortable lubliftence, is
©bferved by M, Peter Abildgaard,ifr his before-mentioned jubilee
fiipfehj where h? lays,. » Itismot mucLaboye a hundred years
fince the only .inhabitants of thefe parts confifred of fevefi ©height
families, making about thirty or forty petfonsj and thefe led p
favage life, and derived all their fupport from huntingi:Whereas,
now, the ntumber of this ^congregation exceeds two thoulaad; ex-
clufive of the neighbouring, which contain many niorej and all
fubfift by the working of the mine.”
To the Roraas copper-work belong feveraf -founderies, wKirb
for the conveniency of a ready iupply of wood are built at a dif-
^pce from each, other, and in places, to- which in winter* when
the morafles and rivers are frozen, -the ore may be conveniently
carried. Particularly at one place called . Tolgen, four miles from
Roraas, are three founderies, and of the copper for.lbme years
melted in them, I Ihall here let down an account taken, from
Mr. Schwedenborg.
Year. ; Ship pounds of pure çoppër. i
I
00
0
0
! r YO&lH
1 JQQ.^y.; àjfrujfcigW «SJi 1140. .'•
' iypz^ jjL||d jgg|| 1 -97 S
/■ . : r79A : . : i f ! vW^'r i ’ 1.5 I 4 ; ; u
. 17,06 , r 1467- ;
0
00
1
1
• .1460 -
1712 .. W ‘ - ï a s i i
1718 -- .. -n 9 3 3
. I722 • ■ , --B .1087
X.723 ; riaa
I724 1128
' Thefe founderies annually confume betwixt 12 and 15000 lafts
of .coals, and 5 or 600 fathoms of wood.
S E C T . VII.
Next to Roraas Is the .medal or lykken copper-work, four Norway
miles and a half from Drontheim. it is laid to have been
dilcovered’iii 1654. Its founderies lie near Svarkmæ, and Grud-
'3 1 letter,
■ lîA ^ t T R A L R W A T . 195
fetter, !ànct‘ according to the fame writpr the produce of them Ms
been al/rolïôWs; ' "
Bt::.SvaHkmæï/
Ship-pounds of b
Grüdfrtten
,? Ship-pounds of
Year: i Ipurefcapper. pK t . pure copper. J i 1
lu . : 1,2® U
• i.72i tyftâffyt®
56,6 'û d 263. '
I 7'23 MW naî-lW- ;; 210 I
7- ~ - 2I5 *
E ! rÇ T. VIII.
- WTheJndfet or-Quickne coppèrrwork lies; ten Norway .miles from ne Mât,
Drontheim, and-though difëovered in xé-j^j'was not wr©ught tp
any. great effeâ; till ryo^. (i ; :Xts:oi«' of eafrer fe8oÿ, tMn Ahbr
former^ pid has lefc ftorie in it, - but ofl thatta<|©oJ^§£|k the more
i^turated with; lidphùreoiis: particles. : A <|uinfel§>£ yifjds
ih frup.-pounds>ofrô^{^jAvhfchl^uirefa^-jr^ laft$ @f coalj and ,
its annual ;produce <is:betwixty3Xand 4^ifhip^>0ii®p^sii mGtât
The farmer dàe£tor,^ï.-RrdftfuprPa^ -fotadfoi® 'a me(h^ her^
by precipitation, to tranfmutc iron into copper i. ifre proeèls, of
which‘h thus r Near theicav^ns lie .h e ^ -^ , mareafitgsran<lï^®ifts
through which: water jK|made; to run into i little channels , filled
with hits of iron laid lengthways one below th é h th ^ .à fSPhis
triolic-water carries with it the copper iedinient* and dofoetimes
jÇe^pW-itlItf, and permeates through the iron till at fongth; ifr-bej- '
comes copper. I have a ^ee»en-of this’ tranfmwtaîfon^xhough
# feimperfe®:, that tifè internal part is iion, and therfetflcfe
on all lides copper. -Half a year is the term of a complete, tranf-
mutation ; but it mufr he
IpiQ; tcrthe.’tij6e, 1 for if it Ihould he a few days faeybqdMthe règu*-
lar period, it would bè Ipoiit by the drols and metal intèrnmring.
The iron friffets a diminution in its- weight,* bôtx this is-eompem-
fated iii iiè |>rofr4 ; h f the tranlmutatiôn; X remèmber Count
Marlilli, in his before-^cifed ^vorkj rhèntîons à jwaâice of-tfds-na-
ture at one of the copper-: Works’ in Hungary, Where the vitriolic-
water, Running1 froth channel-' tô channel produces !â like effect,
and has illuftrated his account o f'it with a copper-plate.- - J
E e e ' ' x S E C T .