200 C. L. Dresser on the Conducting Powers of Wires 



From the above table of experiments, it is evident that the 

 often quoted law of the conducting power of wire being inversely 

 as the length does not obtain in short lengths. But there is an 

 evident intimation of some other law, and probably different for 

 different metals. 



Broke glass thread. New thread gives 300 without altering 

 battery power. 



Table II.— One cell. No. 16 wire. 



From this table, compared with Table 1., it does not appear 

 that with a thicker wii'e there is any nearer approach to the old 

 law, but also that some other law obtains. 



Table III.— No. 16 wire. 



Battery power 400. 

 cells. 



Intensity two 



Increase of intensity does not appear to approach near to the 

 supposed law. 



Table IV. — Wire measured with a micrometer in hundredths of 

 an inch. Battery power 207. One foot of wire. Diameter 

 of galvanometer wire 740 of an inch. 



