St 



140 MURIATIC .\CID, 



f he gas farther fucceflively, on two, three, and four meafiires, and always the 

 eu'dioraeur^i^v"''^'^''P''"" refulling tVom the inflammation by tbe eleflric 

 the f4ini refult i'park, gave the fame indication of about 0,30 parts of 

 oto,30oxi£cn. ^^.^^^^ 



Experiment 11, 



Apparatus ufed Two grammes (31 gr.) of diftilled water were put into a glafs 

 mfecondex- j^j^^ j^^j^^ ji^^^ j|j,_^ f-^j.^ q^- ^ fyphon : two wires of gold of 

 pcnment def- J i ' o 



cribed. Commerce of about 0,003 inch in diameter, pading into the 



The fand is water at about 0,024 inch diftance from each other, were 



inoiften;;d with . ^ 



river water con- inclolea in this tube ; the tube was then placed upon an 

 taining i fix- horizontal pile of fifty double plates, of about S\ inches 

 The gold w^re is '" ^^'^^ ^^^^^' ^'^^ intervals between them were filled up 

 rfi(T.)lved and with dry fand, and then moi/tened with river water acidulat- 

 precipitaa t ^^^ ^^^^ about -^^ of nitric acid. The wires of gold having 

 been placed in communication with the two poles of the 

 pile, the water in the lube afl"umed in the firfl: day a reddifli 

 brown tint at the fide of the copper pole, and the wire 

 which paffed to that part was covered with a coat of oxide 

 of gold of a deep brown colour. The wire which com- 

 municated with the zinc pole did not afTume the fame tint ; 

 the gold of the wire was diffolved by degrees, and was 

 very little gas precipitated togeiher with a part of the filver. This pre- 



produced, the cipitate exhibited with a magnifying lens, over almoft the 

 water in the o j r> • 



tube is not whole length of the tube, cryftals in needles. The wire 

 diminithed I- coriefpondiug to tlie zinc pole was entirely deprived of the 

 gold which covered it, and then only contifled of a thread 

 of filver of extreme tenuity. But very little gas was dif- 

 charged from either extremities of tlie wires. The water was 

 not diminiflied a fiftieth part of its volume. 

 The pile con- The pile continued in a6livity 40 days from the 28th of Mef- 

 forty davs. ' fidor to ilie Sth of Fru6lidor. It indicated then on the lafi day 

 Indicutes by the by the ele61roraeter (fimplified by one of the Members of the 

 intfnfit^'^o" ""^ Galvanic Society, from thatconfiruded in Germany, defcribed - 

 l4o*. in {he Journal de Phyfique for the month MefTidor, an. 13,) 



J^ifor'inthc"^ an intenfity of 840 degrees. The liquor remaining did not 

 tube (hews no afford, by any of the different reagents, the leaft trace of 

 trace of acidity oxidity ; a metallic tafle was alone perceptible in it. 

 reagents, and The galvanic fociety, in examining chiefly the refults of 



kai a metallic the firft experiment, as correfponding more particularly with 

 the hGi announced by M, Pachiani, have confidered, that iu 



allowing 



