Jgg EXPERIMENTS ON MAGNETISM. 



In phials con- manner: In the firfl; glafs were placed two wires, one with 

 taining water 36 j,^^^ ^^^^^^ p^,^ immerfed in the fluid, the other with the Couth, 



parts 



nitric acid 



I part, wfcim- avid not more than half a line afunder : In the fecond, the fame," 

 meifed: i. a i . ^^^^ jpjg wires an inch and three quarters apart: In the third 

 and S. i>ole, at , r , ■ . • • , ■ r 1 i /■ u 



i aline jiilance: and fourth were each three vvire^;, with the foiith poles of all 



a. the f.intie li immerfed, but their diftances in the fwo glalTes different, as 



"oieV ar Valine: ''^ ''^^ ^''^ ^"^ fecond : In the fifth and tjxth were wires fimi- 



4. th- lame at Jarly arranged, but with the north poles immerfed, Differertt 



K* '"le ' ac-^a quantities of oxide were gradually depofed ; and to exprefs 



line: 6 the the whole in few words, we will call the fouth pole S, the 



famfc ^^^5J^ north pole N, their greater diftance g, and their lefs p; and 



fitcdin thefe we will exprefs the order of oxidaii()ti< as follows: S NgJ> 



wi^hrefpeato s N p > 3 S o > 3 S ^ > 3 N o > 3 N ^ > . On the nine- 

 quantity was in -''^ ' '^ or^ r *^ or^^ 



the following teenth day it was obferved, that the lofs of fluid by evapora- 

 order: No. s,, tjon ^^d not been equal in all the vefTels, but took place in 

 The'lof> 0/ fluid the inverfe order of the oxidations. All the magnetic wires 

 by evaporation, vvere weakened in power; NS^leaft; NSpmore: of the 

 ve^'fe'ladoof" ^'''^^ ^ ^ P' *^^'° ^'^^ ^^^^ ^^^"^ power than the third; and in 

 the oxidations, like manner 3 Sg, 3 N p, 3 Ng, had each two left more 

 All the magnets po,^^^^-^! t^^n the third ; the flrongeft were equal to N S a-. 



were vieakened » _ ' ° ^ »_ 



inpower:No. a In another experiment, where two little vefTels filled with 

 leaft; i more: i^fufion of litmus were employed, one of them containing two 



in all the reft . . , r , , r , • , • r , • 



one wire was magnetic Wires, the louth poles of which were immerled m 



weakened more jh^ fluid; the other two fimilar wires, of which tlie oppofite 



On imrr.erfing * poles were immerfed; the oxidation was greatefl in the latter 



two fouth poles vefTel *. 



L"oXShrr° Laflly, Mr. Ritter endeavoured to conflruft a battery of 



tlie latter were magnets, but he did not fucceed. For this purpofe he em- 



moft oxided. ployed a hundred and twenty magnetic wires, placed fo that 



cd unfuccefs- each pole had its contrary oppofite to it, and feparated from it 



^ta^ T^w Vh ^ ^^^ ^ ^'■"P "^ water; but this apparatus produced no effea. 



120 magnetic The ingenious author, however, has not relinquifhed the hope 



wires, their of beiuij able to compofe a magnetic battery, thouarh other ex- 

 pole^ j.laced in . '^ . , r ■ . . • , ... 

 oppofition, and periments, not lels important, have lutherto prevented him. 



fepa ated by a 'f'ljjs feries of experiments he confiders only as the commence- 

 buTh^e hlTnot '^^"^ ^^ ^ ^^^V extenfive labour, the refults of which we hope 



given upthede- foon to obtain. 

 fign : and means 



quires on the * ^his appears contradi^ory to the experiment adduced in the 

 fubjtft at large third paragiaph. T. 



veryextenfivcly. 



Obferrations 



