2nd Frame 
target. 
156 
MINUTES OF PROCEEDINGS OF 
The circuits which it is necessary to establish are three in number; their 
direction is shown in Tig. 5. 
1st Circuit.1, 2, 3, 4, 5, 6, 7, 8, 9. £ & a 
2nd „ .10, 11, 12, 13, 14, 15, 16, 17, 18. 
3rd „ .1,19, 20, 21,22, 23. »h £ 
1st Circuit.1, 2, 3, 4, 5, 6, 7, 8, 9. £ & a 
2nd „ .10, 11, 12, 13, 14, 15, 16, 17, 18. 
3rd „ .1,19, 20, 21,22, 23. »h £ 
The first circuit includes the first wire target 2, the two pressure screws 
belonging to the straight electro-magnet of the pendulum 3, 4; the two 
pressure screws on the left of the disjunctor 5, 6, and the two poles of the 
larger battery 1, 9. 
1st Circuit 1, 2, 3, 4, 5, 6, 7, 8, 9. 
The second circuit includes the second wire target 15, the two pressure 
screws at the extremity of the rods on the conjunctor 13, 14 ; the two 
pressure screws on the right of the disjunctor 11, 12, and the two poles 
of the smaller battery 10, 18. 
2nd Circuit 10, 11, ]2, 13, 14, 15, 16, 17, 18. 
The third circuit includes, the two pressure screws belonging to the large 
horseshoe magnet of the pendulum 19, 20; the two remaining screws on 
the conjunctor 21, 22; and the two poles of the larger battery 1, 23. 
3rd Circuit 1, 19, 20, 21, 22, 23. 
Thus the first and third circuit include the larger battery, and the second 
circuit the smaller battery; but the first and third circuits are never open at 
the same time, as the first circuit is always broken before the third circuit is 
made. 
