46 Laws of the Elementary Voltaic Battery. 



The 1st plunge gave 4-220° ") In both these cases the deflection 



« 2nd " " -230 ) settled in 1 minute at 57°. 

 Removed from the solution for 4 minutes, they v?ere dipped twice 

 in succession at an interval of 4 minutes. 



l.y unge gave +200° | p^^^^„^„, ^^^^^^^^ 5,0 



3 minute intervals. 

 1st. plunge gave --200° | p^^^^„^„, j^j^^,i„„_ 550 



2 minute intervals. 

 1st. plunge gave - 1 80° | Permanent deflection, 54° 



1 minute intervals. 

 1st. plunge gave -170°"^ 



2nd. " " -160 V Permanent deflection, 64° 

 3rd. " " +150 ^ 



10 minute intervals. 

 1st. plunge S'.je_^270° ? | p^^„^^^„, j^g^^,;„„_ 550 



20 minute intervals. 

 Ist^ plunge gave +^0° | p,,^,„,„, j,fle,„-„„, 550 



30 minute intervals. 

 Ist^ plunge gave +320° | ^^^^^^^^^ deflection, 55° 



45 minute intervals. 

 1st. plunge gave +330° ^ p,,^,„,„t deflection, 55° 



120 minute intervals. 

 1st. plunge gave +340° | p.^^g^.^^ deflection, 55° 



8. As the accurate observation of momentary effects in the preced- 

 ing experiments depended upon the dexterity w^ith vsrhich the key of 

 the galvanometer was adjusted to the deflection, and as it is impossi- 

 ble to obtain with the desirable accuracy the first effects of immer- 

 sion by turning the torsion key at, or immediately after the moment 

 of immersion, in consequence of the instantaneous and very great 

 decline of the force, another and more perfect mode of observation 

 was devised and a new series of experiments performed. We now 

 set the torsion key previous to immersion, at such an angle as was 

 thought from preceding observations to approach the expected ef- 



