80 



with sulfuric acide, a modified Mascart type), fixed on a 

 construction of wood posts, in rectangular spires, about 1,5 

 m from each-other, covering a surface of 300 to 400 m 2 . 

 By means of a conducting wire on similar insulators this 

 point-apparatus was united with a galvanometer, which on 

 the other side was in connexion with an earth-plate of 

 amalgamated zink. The diagram fig. 5 shows the two 

 apparatus built on the mountain Pietarintunturi. 



The both apparatus are visible on the mountain and 

 the conducting wire on poles to the galvanometre G and 

 from it to the plate p in the soil. 



From this description it seems that the construction 

 of the point-apparatus is founded on the effect of points on 

 electricity. Every point is a means by which the electricity 

 is gathered or streams out according to our views of elec- 

 tricity. But however this may be, the effect is that an 

 electric current flows through the apparatus, the conducting 

 wire, the galvanometer and from it to the zink-plate in the 



