1000000030

Ihcrc is 'o unfucccbful eon of your opmtion.

is eafy

10 pcreei.e Ihis by the lIink of

g~'¡i~k

which you will

fmd!

~hout

the

furn~ce ; ~nd

morco"er, Ihe

Aam~

tha!

itTu~s

Ihrour.h the apenures

the

rcveruer~l()ry

"di

be of a bCAutiful violel enlollr. The

~cid

of fCJ-f"lt

.Iways eivcs this colom tO Ihe Aame of f"eh

m~lIcr,

~re

bUlnt along wilh il. BIlI ir Ihe retnrl break be–

fore the phofphorus hath mane ilS

~prear~nee,

ilS eoo–

tenIS mal' be faved uy throwing

numuer of cold bricks

inlo thefire-place, ano upon them a liule watel 10quench

Ihe fire at once." AII Ihefe ufeful obfervations \Ve owe

alfo to M. Ilellot.

The rho1jlhorus here defcribed was firn difeovered by

a eilizcn o( Hamburg

n~med

Brandt, who \Yoiked upon

urine

karch o( the rhdofopher's none. Afterwards

two other A<il(ul ehcmifls, who knew nothing more of

the proeefs Ihanthat phofphorlls was oblained fromurine,

or in general from the hllman booy, likewife

end~avour

ed to difcover ir; and eaeh of thern fer.ralely did aau–

ally make Ihe difeovery. TheCe IWO ehemills \Yere

Kunckel and Boylc.

The former perfeacd Ihe diCeol'Cfy, and (ouod out a

mClhad of making it in confiderable quanliries at a time;

whieh oecafioned it 10 be called

Kl/ncJ,I', phofph.,u,.

The olher, \Vho was an Englifh gentleman, had nOI rime

lObring his difeovery ro perCeaion, and eonremed him–

ldf "ilh

lod~ing

a voucher of his having diCcovmd it in

rhe hands of Ihe Cecrelary of rhe Royal Society of

London, who gave him a cerri6cate Ihereor.

" Though Branol, \Yho h.d before rhlS Cold his feeret

to a ehemill

~amed

Krafft , fold it aCterwards ro feveral

orher perColls. and even at a very 1011' rate: and Ihough

Mr Boyle publlfhed the procefs for making il ; yel it is

rMremely

pro~able

thar bOlh of Ihem kepl in rheir own

hands Ihe mancl-key; I mean,

th(

,a,'ieula, lIIanng'–

lI/(IIl

ntc(!la,:,'

1/Ial,

Ih,

.pna/ion

(lIccud:

For till

Kunekel found il our, no olher chemin ever made anf

conf,derable quanlily thereof, except Mr Godrrey Han–

Wil" an Englifh ehcmill, tO IVhom Mr Bo)'le revealed

.he wilole "')'ltery .

" Ana

thus it t'me ro p, fs, that, ,fler Kunckel and

flo)'le died M G'ldfrey Hnnkwilz IVas Ihe 0011' chemill

Ihal conld furpl)' Europe .hereIVith ; on IVhieh accounl

jI is hkeIVife very wdl known by Ihe Dame of

Englijh

·/IJ."

AlmQil

all l~e

ehemilts eonfider phofphorus as a fub–

flaoee

eo~filting

of Ihe acid of fea·falt combined Wllh

Ihephloginon, in rhe fam e lIIanner as fulphu r confilts

Ihe vitrio!ie aeid combined ,,"Ih rhe phlogillon. This

o?ini~n

is fnuoded on Ihe following principl.,.

r"n. urinc ahnunds wilh fea-falr, and eonlains alfo

a gr.;!t de.1of phloginon: no\Y Ihefe are the in¡:redients

of \lhich rhey coniellure phofporus

be eompoled.

Secondl •• phofphorus h" many of the properties 01

fulrhu r; fueh as beinf foluhle in oils; mclting wilh a

gende hm ; bcinr. "ery combunihle; borning IVilhout

any fool;

givin~

a vi,id and bluiOl llame; ,lid laltly,

learing an acid Ilquor \'liten burnl : fenfible proofs Ihal

ir differs froltl fulpbur in

nothin~

but Ibe nature of its

aeid.

Thirdly, Ihis aeid of phofphoru!, beinfl mixcd with a

folulion of Glver in fpirir of nilre, preeipitate, the fi lm–

and this precipitale is a true

luna

(o,'''.,

whieh appear;

10 be more

vol"i le

even Ihan Ihe common fort. TI",

J" él proVcS more ineonteltably Ihat' the .cId of phofpho–

rus is of Ihe fame narure Will, that of fea-fall .

Fourthly, M. Stahl obferves, thar if fea-falt be

Cdl!

00 Jive eoals, Ihey ionandy burn with grear aaivilY'

rhar chey emil a vivid Baroe, and are mucll fooner eoo:

fum~d

thao if· none ·

thi, fall had touehed them ,'

rhal fea·fall in fubllance, whieh will be,r the violence

6re aeonfidlrable lime when fufed in • erueible, wilhou!

funain,ng .ny fenfible diminutioo, yer evaparales ver

quickly, .nd is redueed 10 white Rowers, by rhe im–

mediate COnlaa of burniog eoal,; and lanly, rhal Ihe

Bame whieh rifes on this oeeafion is of a blue colour in–

clining to violer, efpeci.lly if ir be oor thruwn direaly

on rhe

co.ls

IheOlfe! ves, but kepr io fufion aOlidfl burn–

ing coals. in a elucible fo plmd Ihal the vapour of Ibe

fall may join Wilh the inBamed phlogifloo as il rifes froru

the

e~als.

111&

experimeolsof Mr Sta"!'s prove, rhal the phlo–

gifioo aas opon Ihe acid of fea-falt, eveo while il is eom–

bined lUirh ilS alkaline bafis. The ftame thal 'ppms 00

this oeeafion mal' be confidered as ao imperfea

phofpho~

rus: aod indeeu its colour is exa[l/y Ilke thar of phof–

phorus.

AII the f,as above re/aled e,ince, rhat lhe acid of

phofphorus is akin 10 Ihat of fea-falt;

mher, that ir

is the very falne. BUI thue are other faas whieh prove,

thal this acid undergoes fome ehaoge at Ican, fome pe–

culiar prepmlion, before il enlCl> inlo the

eOOlp~fitjon

o( a trne pholphorus; an,l th. I, wheo eXlrielleu Ihere–

from by burmng, it is Ilor apure acid 01fea-f,It, bur il

fii/l

ad~llerated

\Vi lb a mixlure of fome uther fubndnce ,

whien lOakes ir confio: rably differenl írom thar aeld.

For Ihefe obfemrioos we are obligtd 10 M. Marggraff.

111. Marggraff halh alfo publifhed a procef, fur ma–

kiog phofphorus, and atTures us, Ihat by means thereof

we lIlay obrain in lefs limr, IVith I¿fs hcal, Ids Irouble,

anO

cxpellee, a greater quanlily of phofphorus th'Q

~oy

otber melhO<!. His operarion is Ihis :

He take, tWO pounds of fal ammoniac io powder,

whieh he mixcs accuratcIy wilh four pounds of mimurn,

Thismlxlure he po" inlo a glaCs relOl l, and wirh a gra–

dualed lire draws off a very Alarp, vol'lile, minou! fpiril .

We obferveu

Par!

Ihal fome metallie fubnances

have the propeny of decolllpofing fal ammoniac, and fe–

pmling irs volalil. alkali. MiolUm, wh,eh i, a

e.lx

Icad, is one of rhol;, metallje fubnaoces. In thi! expe–

mntnl il d<compofes rhe f.1 amOlooiae, and f¿pames ils

volanle alkali: whal remai.'s io the relorl is a eombi–

ndlion of Ihe nllnium \Vilh the .cid of fal

ammoni~c,

\Vhich is well known10 be Ihef'me wilh Ihe marineacid:

and eonfcqueotly tho rdiJue of tbis opmrion is a fO il of

plumbulII

UJ'''t UIII,

The quanlily thereof is foul pounds eighl ounees.

ulis he mixcs Iltree pounds with nioe or len pouods of

urine, tha! IldS 1I00d putrefying for !WO momh!, eupo–

wcd

tbe confinenee

honey. Thefc he Olixes