Mr. Pepys*s Galvanic Apparatus, 95 



Rue in ufe for a confideraljle time even with the application 

 of Itrong: acidulous liquors, thev are made of fuch a thicknefs 

 that each pair weighs four pounds. The troughs are furniftied 

 with pivots at each end, by which they rell on the bar B of 

 the table into which the whole apparatus is framed : on 

 thefe pivots, which are fo placed as to throw the centre of 

 gravity of the troughs below them, the troughs revolve whea 

 il is neceflary to empty the ceils. 



C. A japanned iron tray or receiver, capable of hold- 

 ing the contents of the cells of the troughs when they are 

 emptied. 



D. A range of fix funnels made of tin, the diftances of 

 the tubes of which are fo adjufted that they enter fix of th6 

 cells of the troughs at once. 



E. A tin velVel having fix dillinft cells with fpouts, each, 

 capable of containing the exatSt quantity of fluid necellary to 

 fill a cell of the trough. 



By means of the funnel D and vefl'el E, the troughs 

 are filled with vcrv little trouble, no more being neceflary 

 than to fill the vefiel E by dipping it into the fluid or acid, 

 and then emptying it, bv the fpouts correfponding with the 

 divifions in the funnel D, into the latter, the pipes of which 

 are placed in the correfponding cells of the troughs. 



FF the two prime conduAors, being two brals rods with 

 flioulders. They pafs through holes in the top of the table 

 (which, to (liow the arrangement of the troughs, appears 

 elevated in the engraving) into the end cell of each trough. 



GG two metallic conduilors, each confilling of two parts 

 joined by fockets, and each having a focket which fits upon 

 the prime condu6lors FF. By this contrivance they are 

 movable in any diredlion required in the experiments. 



H H two fhallow veflels made of tin, with tubes .under- 

 neath, by means of which they can be placed on the tops of 

 the condu£iors. When filled with water they are found con- 

 venient for giving the Galvanic filiock in a very perfc6t mau- 

 uer, and for other experiments. 



I, an arch of metal to unite the troughs at their further 

 ends. 



When the cells are filled, the troughs conne^ied by the 

 Bietallic arch, the top or lid (hut down, and the prime con- 

 du»?,tors put in their places, the apparatus forms a Galvanic 

 table free from any incumbrance, and extremely well adapted 

 for every experiment in Galvanifm. 



On the 3lft of Febrviarv, with a number of fclentific gen- 

 tlemen, we witntffed a trial of this apparatus. The experi- 

 ments 



