a letter from the reverend henry miles, d. d. f. r. s. to mr. henry baker, f. r. s. of firing...

A Letter from the Reverend Henry Miles, D. D. F. R. S. to Mr. Henry Baker, F. R. S. of FiringPhosphorus by ElectricityAuthor(s): Henry MilesSource: Philosophical Transactions (1683-1775), Vol. 43 (1744 - 1745), pp. 290-293Published by: The Royal SocietyStable URL: http://www.jstor.org/stable/104468 .

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L290 g of the Date, Imuflc beg Leave to refer to N. 43 9 of the tranf6lHions mentioned above. But as this Man ner of writing the Four appears as anticnt as the Time of yohannes de Sarro BoJ<so, whe died in the Ycar IzS6, the A^,e of this IriJb Date cannot SO xvell :be determined by that Figure, as by the form of thz Eive} which follows it, and fO exad:ly agrees witl the modern Shape, that it cannot, I think, froxrj arly In&ance I have yet met with, be juAly decmed nauch older- than the lixteenth Century.

Upon the bePa Judgment therciore, ;which I caa form of thgfe two DatesX from fuch A$guments as the Natllre of the SubjeEt admits ofX it appcars tO nze highly probable, that neither of them can be more antient, than the Times I have here aEl ,ned thcme

GreJha7n CoAlege, Feb. 2t J. WardO

XIV. X Letter froffl the Reserend Henry Miles, D EZ). F. R S. to Mr Henry Baker, F. R S. of firiag Phofphorus by Eledricity.

I)evr Sir, Rt$@Mtrc:h 7TTeam-e into my Head lal Sighe) to 274+-; 1 try svhether the EfRtia of an exciled 31afs Tube would not kindle 'PhoMphorgs; andX having be*n ufsnt, my Tube for the fake of a little Ex ercife, I took a Emall Bit of about a Quartcr of an

Inch

L290 g of the Date, Imuflc beg Leave to refer to N. 43 9 of the tranf6lHions mentioned above. But as this Man ner of writing the Four appears as anticnt as the Time of yohannes de Sarro BoJ<so, whe died in the Ycar IzS6, the A^,e of this IriJb Date cannot SO xvell :be determined by that Figure, as by the form of thz Eive} which follows it, and fO exad:ly agrees witl the modern Shape, that it cannot, I think, froxrj arly In&ance I have yet met with, be juAly decmed nauch older- than the lixteenth Century.

Upon the bePa Judgment therciore, ;which I caa form of thgfe two DatesX from fuch A$guments as the Natllre of the SubjeEt admits ofX it appcars tO nze highly probable, that neither of them can be more antient, than the Times I have here aEl ,ned thcme

GreJha7n CoAlege, Feb. 2t J. WardO

XIV. X Letter froffl the Reserend Henry Miles, D EZ). F. R S. to Mr Henry Baker, F. R S. of firiag Phofphorus by Eledricity.

I)evr Sir, Rt$@Mtrc:h 7TTeam-e into my Head lal Sighe) to 274+-; 1 try svhether the EfRtia of an exciled 31afs Tube would not kindle 'PhoMphorgs; andX having be*n ufsnt, my Tube for the fake of a little Ex ercife, I took a Emall Bit of about a Quartcr of an

Inch



[ 29l ] Inch long, whicll has lain by me thefc ten Years; and hasin;, notllinD at hand convcnient for luoldillg ie, I roll'<l it up in a Emall Piece of white Paper; and applying it to the cxcitcd Tube, it imluediately took Fire, emitting a conluderable (Quantity of Flame and Smoke: Aftcr bome time I quencll'd it, by dippillt, it into \0;ater, nvhich was ready for tlat PUrpQf¢; and taking it cllt a^,ain without Raying any longer than to bc fatisfied it nVAS not on Fire, I applied it as before, when it filddenly took Fire, as at firR: This I repeated in the fame azanner for fix or fcren times xzrith tile like Efed;t; tho' the PhoJ9horss could not be drained of thc Water, efpecially as the I?aps about it svas x^Zer.

The Room in nvhicll I made tlle Trial was llot

abSolutely dark, hasing a dull Fire (tllo' without any

Candle): The Tube I uCe is about two Feet and a half long, the Diameter of the 13ore nearly one lnch, the Thickllefs about one Eighth of an Inch, hermetically fealed at one End (which Sort are, by the nvay, moflc convenient for rubbing): Tlle (PhoXho-

rxs was 11cld generally about five Inches from the Tube; but once or twice brin",ing it nearer, I could

perceive a continued Ray of Light from tlle Tube to ehe PhoJpshorns. Some Occafions callin: me away in the rllid0, I could not be more accurate; but I nvould not omit to tell you one ObServation I made, upon preTty rmartly exciting the Tube, that the Cor- rurcations of Light were larger, more fubllantial, and of a more re^,ular Form than I had eszer obferved them before, This happen'd, not xvhen the PhoJ9ho

rxs was applied, but in the Intervals. NVhether any of the Fllmcs of the Pho/p:hors, wllich remained in

the



[292 ] tllE Room, m,>llt contributc llereto, I cannot tetlX tho' it iS not very likely. I thall ateempt beloxv togive ystx, 3S Nvcl t as I can, thc Form alud Sizz of the Rays of I i:,llt} as tlacy appcarcd immediately after nly xs itlldranving n:a Hand, svithout applying tny Fint,cr) as is uluall) done tO produce tlle Unapping of the EbYuviv. ThoX I nevcr n ade many Trials with (Pho/2horz¢s, yer as I am not in6enfilble, tllat fonle tolid Kinds of it n^?ill be infllmcd by thz ncre Aftiolu of tlle Aic lopon it, when it is taken out of the Water in nvhich it is urually kept; I was thereforc minded to try wllether thc Air xvould hante that EMeEt upon mineX and ac- cordingly took it out of the Water, with a Foraeps, and laid it donvn on a Sllelt; fio as nothing toucll>d it but the In{trumetlt svllich held it but I could not percein c the leall Glinzmering of LiC,hta tho' tlle Place vas iufficientlyt dark, aftcr it had lairl tllere for the Space of half an HourX wrhich I tiOUglt lono cuougl to fatisfy me, tllat it Nvas not kindled by thc Ad?cion of tlle Air upon it in the abose-mentioncd Experi- ment.

If arou have known tllis Trial tO haste been made bar any one lJefore, you will caR this into the Fire; and h-onvever bcliese, that I amX nZith very great Siru- CCl lt\'}

} zDear Sir, Loxr moJ? afetlionate,

and obliged 15xm61e Servant,

H Miless

SPt



See TAB, I. Fizg. 5. S. Reprefcnts the Tube ssilich I held in nzy Rightt

llandX and excited svith luy LeftX having on a Glove} which I find more conGrcnient for mc in rubbing it. I Ihould obServe that my Mcthod thcn was to rub it Emartly for about half a ficore times up and down; and then gi?ing ie one brisk StrokeX beginning at the End from me, upon difcharging my Hand quick from the Tube, the Corrurcations of Light appear'd as mark'd ca and 3, both in Size and Form: Som: Allowvnce nnay be tnought rcaSonable tO be made for ones.Judgment in fucil a Caf., t'ne Iviotion being fo- tcry fuddell, and the (Phznoyneaon fo foon difaPPearin ,. BUt I intend tO rePeat the EXPer;ment nahenever the Tcmperature of the Air Ihall be favour- abLe, NShiCh I dOn't find it to -be this Morn nC,. I for F0 tO mentiOn, That, dUring thiS Trial, I fOUnd the Elzovia trOUbleSOme tO AY ENteS tO a great D2grCC, OCCaE10ning a VerN\fVnElb1e EmartinC, PAin,NVhiCh Did nOt 0 Off fOr SOme X;me ; thOX I neVCr deFigned1Y brOUght theOrUbe near mY FaCe. ThiS xs-as thc firR timC Of

Ena thiS TUbe.

XV. >4t ObJertsoztion of a FraSsre of the C)s Humeri y the Pover of the Mu/tcles onSy; by the late Claudius Amyand, &?; Ser- jeant Svrgeon to His M+eyYy.

Stad March 7 T H E outsrard Caufcs of FraCturcs not /445 1 being fiufficient to break or tear alunder the brokcn Pieces of a fraftur'd ICncc-pan,

Ji).

See TAB, I. Fizg. 5. S. Reprefcnts the Tube ssilich I held in nzy Rightt

llandX and excited svith luy LeftX having on a Glove} which I find more conGrcnient for mc in rubbing it. I Ihould obServe that my Mcthod thcn was to rub it Emartly for about half a ficore times up and down; and then gi?ing ie one brisk StrokeX beginning at the End from me, upon difcharging my Hand quick from the Tube, the Corrurcations of Light appear'd as mark'd ca and 3, both in Size and Form: Som: Allowvnce nnay be tnought rcaSonable tO be made for ones.Judgment in fucil a Caf., t'ne Iviotion being fo- tcry fuddell, and the (Phznoyneaon fo foon difaPPearin ,. BUt I intend tO rePeat the EXPer;ment nahenever the Tcmperature of the Air Ihall be favour- abLe, NShiCh I dOn't find it to -be this Morn nC,. I for F0 tO mentiOn, That, dUring thiS Trial, I fOUnd the Elzovia trOUbleSOme tO AY ENteS tO a great D2grCC, OCCaE10ning a VerN\fVnElb1e EmartinC, PAin,NVhiCh Did nOt 0 Off fOr SOme X;me ; thOX I neVCr deFigned1Y brOUght theOrUbe near mY FaCe. ThiS xs-as thc firR timC Of

Ena thiS TUbe.

XV. >4t ObJertsoztion of a FraSsre of the C)s Humeri y the Pover of the Mu/tcles onSy; by the late Claudius Amyand, &?; Ser- jeant Svrgeon to His M+eyYy.

Stad March 7 T H E outsrard Caufcs of FraCturcs not /445 1 being fiufficient to break or tear alunder the brokcn Pieces of a fraftur'd ICncc-pan,

Ji).

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a letter from the reverend henry miles, d. d. f. r. s. to mr. henry baker, f. r. s. of firing...

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