334 Mr. W. P. Boynton on the 



Table III. (cow.)-— Series 3. rc = 136. 



a. 



v . 



b. 



Ii. 



*■ 



1 ? 



R. 



•2 



7,300 



0,900 



•73 



20-5 



•038 



100 



tt 



»> 



10,400 



•635 



27-1 



•037 



106 



,, 





14,100 



104 



101 



•057 



44-5 



M 



,, 



14,350 



98 



11-4 



•056 



459 





, 



18,050 



1-26 



69 



•07 



296 



,, 



,, 



18,500 



119 



7-7 



064 



35-4 



•4 



13,650 



15,650 



•66 



87-5 



•038 



352 



>> 



,, 



15,840 



•70 



77-8 



•045 



250 



! „ 





18,250 



•90 



473 



•058 



150 



i n 





18,900 



108 



32-6 



•065 



120 



>! 



H 



21,600 



1-20 



266 



•075 



90 



f 



,, 



23,200 



1-20 



266 



072 



98 



•6 



19,450 



20,200 



•56 



246 



•03 



1,145 









21,400 



•92 



92 



•053 



365 



>> 





22,300 



•97 



82 



•058 



307 





j> 



26.500 



1-30 



463 



•076 



178 



>» 





28,000 



1-33 



44-1 



•075 



182 





M 



29,100 



133 



441 



•079 



164 



•8 



24,500 



25,850 



103 



116 



•056 



521 



>> 



)? 



26,060 



•81 



188 



•045 



805 



>> 



M 



28,000 



1-24 



80 



•078 



268 



>» 



„ 



29,100 



123 



81 



•07 



332 



» 



,, 



30,900 



1-41 



62 



081 



249 



>> 



>> 



32,500 



1-47 



57 



•09 



202 



The numerical values obtained from these different sources 

 are by no means identical, but the results deduced from the 

 values of V 2 and I x will be seen, on inspection, to agree fairly 

 well ; and all the results are concordant to this extent, that 

 the values of the spark-resistance, as thus given, are all of 

 the same order ; and that this resistance is a variable, but not 

 linear function of the current in the spark. Fig. 7 gives R L 

 for the same spark-gap as fig. 6, 4 millim., using the same 

 abscissa. 



Whether this resistance falls off indefinitely or approaches 

 some finite limit cannot be told from the limited amount of 

 data here presented. 



Closed Secondary Circuit. 



Substituting in equation (21) the values of the capacity 

 and inductances of our system, we get 



£ = 3-905 xlO 6 , 

 which gives us the frequency 



2tt 



622,000. 



