I 



jinlmal Galvamfm. |p3 



. 5. Wc are informed by Mr. Paul of Geneva (now in Lon- 

 •don) that water holding fulphate of lime in (olution, and 

 iimprcgnated under preflure with hydrogen gas, of which it 

 can take up about one-fourth of its volume, after Handing 

 flopped up for about three months, on being opened was 

 found to contain fulphurized hydrogen gas. This has been 

 repeated feveral times with the fame refult. In diftiUed 

 water not impregnated with fulphate of lime, the hydrogen 

 gas underiroes no change. 



How is the fulphurized hvdrogen gas produced ? There is 

 plainly a decompofition effected, not merely of the fulphate 

 of lime, but of the iulpharic acid, which parts with a portion 

 of its fulphur. — Wi^at bc-comes of the oxygen ? Does it 

 join the hydrogen, and form water ? 



The hydrogen gas made ufe of in the above experiments 

 was procured from the ^ecompofilion of water, by applying 

 it to iron expofed to a high temperature. When obtained by 

 means of fulphuric acid, water, and iron, in the humid way, 

 it has a different flavour, fomewhat hepatic. 



6. Mr. Paul has mentioned to us another circumflance, 

 which deferves to be made known. Water impregnated with 

 hydrogen gas is extremely injurious in dropfical complaints, 

 A gentleman labouring under the dropiy was cured bv drink- 

 ing water impregnated with oxvgen gas ; but during the 

 cure his fervant bv miftake had purchafed fome hv'drcgea 

 water. In lefs than ^4 hours his malady returned : on find- 

 ing out the caufe, and having rccourfe to the oxygenated 

 water, the mifchief was fpeedily remedied. 



ANIMAL GALVANISM. 



Some curious Galvanic experiments were made on Febr»- 

 *ry 18, hy profeffor Aldini, in Dr. Pearfon's le6i:ure-room*. 

 They were by far more inlerefting and fatisfaftory than anr 

 we have vet noticed on at>imals, owing to the pains taken to 

 procure the fitteft fubjeiSfs for the operatiotjs. They were 

 inftituled iu the prelence of his excellency the ambaflador of 

 France general Andreofli, lord Peiham, lord Roxburgh, lord 

 Calilereacrh, lord Hervey, the honourable Mr. Upton, Mr. 

 Cholmondely, Mr. Anchora, Mr. Elliot, and fcveral othei 

 gentlemen of rank. The profeffor was aflifted ably, a6 oa 

 fornier occafioas, by Mr. Carpue, Mr. Cutliberifon; and Mr. 

 I latch ins. 



Among other important fa6ls, it was decifively fliown, 

 I. That a vital attradlion fubfifb between a nerve and 

 niufclc : lor the fufpciided fcialic nerves of a frog, after de- 

 Q taching 



