| 
THE 
MONTHLY 
MAGAZINE. 


ALY. 
For NOVEMBER, 1797. 
[VOL. Iv. 




*.* Communica ions for ibe next Supplementary Numb r Should come to hand before 


the Firft of Fanuary. 
| ORIGINAL COMMUNICATIONS. 
To the Ed:tor of the Montdly Magazine. To the Editor of the Monthly Magaxine. 
SIR, SIR, 
HERE is reafon to think, that the 
- public takes a lively intereft in the 
enquiry, now on foct, concerning the 
anli-venerécl virtues of nitrous acid, and 
fome other mildly operating fubftances. 
I beg leave, therefore, to make it known, 
through the channel of your much-efteem-: 
ed Magazine, that the firft part of a new 
collection of cafes is aétually about to be 
delivered to the printer. JI. flatter my- 
felf, that the direét and indireét effects 
of the -printed reports of my circular 
letter, of September 5th, will be advan- 
tageous to furgery. 
The firfi communications appear to me* 
to augur well. They coniift of a, feries 
of ftriking faéts, accompanied by reflec- 
tions, well calculated to prevent a hafty 
decifion either way. I donot purpofe 
to fend out lefs than a dundred retpcét- 
ably attefted cafes ata time. 
By the information which I at prefent 
poffefs, I.am led to believe, that there 
‘exifts a numerous clafs of venereal cafes 
(for which a regular mercurial courfe 
has been univerfally deemed neceflary) 
curable by nitrous acid and analogous 
fubftances. Whether there is alfo ano- 
_ther clafs of venereal affections, nor re- 
moveable but by mercury, can, I thirk, 
only be afcertained by a very extenfive 
inveftigation. 
The meafure of a. circular letter, ex- 
horting furgeons to make careful trial of 
_the new fubftances, has been lately adopr- 
ed by a furgeon, or fet of furgeons, in 
London. ‘I rejoice that a controverfy is 
likely to arife. Young praétitioners will 
have an opportunity of fignalizing their 
“accuracy ; and the intereft of the public 
“Yequires that the evidence fhould be ri- 
-goroufly fcrutinized. I am, 
Nov. ty Sir, your’s, 
_17973- THOMAS BEDDOEsS, 
_ PS. Ihave already adverted to the probable 
advantage from nitrous acid in fome diforders of 
“Janguor.. I now particulaily recommend it to 
the notice of the faculty, in dyfpepfia, hypo- 
- ehcndriafis, &c. } 
~ Mentuty Mac. XXIV. 
4 
. e 
1% feveral notices to. correfpondents, 
you have obferved, that, of all com- 
munications, szatters of fudi are the moft 
acceptable to you; I fhall therefore make 
no apology for troubling you with the 
following flight fketch of the Manganefe 
Mines, in the vicinity of Exeter. 
The black manganefe is found in con- 
fiderable quantities in feveral parithes 
north of Exeter; it runs, in a direct line, 
eaft and weft, crofling the river Exe, 
about the diftance of four miles from the 
city. In the > parith . of ‘Newton; St. 
Cyres, the ore lies fometimes within five 
feet of the furface of the earth, but va- 
ries in its depth from-s5 to 40 feet. It 
requires but little trouble in procuring, 
being brought up by means of a com- 
mon windlafs; and is attended with 
little dificuity in cleanfing, being fur- 
rounded, on the outfide of the mafs, by a 
red clay, which is eafily chipt off by 
{mall hatchets ; after which the ore is 
wafhed. 
The tenants of the feveral farms upon 
which this femi-metal is found, work ic 
themfelves, paying a-certain fine (about 
ten thillings per ton) to the landlord. 
It.is porchafed of them at a fixed price, 
and delivered upon the quay at Exeter, 
tothe public, at four pounds per ton. LT 
fhould obferve, however, that this ore is 
found jin large maffes, or dodies, which 
are’ connected together, at vatious inter-: 
vals, by veins, or /caders, and that when 
one 4ody is confumed, the. farmers are 
frequently put to much expence in fol- 
lowing the /eader (which will not pay for 
working) in order. to come at another 
body, A {mall boring machine, fuch as 
is uied in coal mines, would, perhaps, 
afford them great affiftance in this par- 
ticular. ny 
This manganefe is ufed in the potteries, 
glafs-works, and alfo with great fuccefs 
in the new procefs of bleaching, by means 
of the dephlogifticated muriatic acid, in- 
vented by M. Bertholet; and it is with - 
pleafure I obferye, that a manufactory of 
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