



IO 



We now o mstruct another <>f tln-M /inc-.mtimony Ir>n 



couples, but instead of pmiiiiu; tlu- /A into tin- Iron coil 



we will more than fill it with ZA (Fijj. 7), and raise 



the temperature to about 400 F. If we put the iron 

 lead connection on to the top at a, galvanometer shows 46, 



Fey. 8. 



