required to produce Sparks in Air and other Gases. Ill 



Table I. — Air. 



Length of 



spark, in 



centimetres. 



Electro- 

 static force, 



Total force, 



Length of 



spark, in 



centimetres. 



Electro- 

 static force, 



Total force, 



per centim. 

 C.G.S. 



C.G.S. 



per centim. 

 C.G.S. 



C.G.S. 



•0066 



398-5 



2-630 



•2398 



127-7 



30622 



•0105 



3197 



3-357 



•2800 



125-7 



35-196 



•0143 



280-9 



4-017 



•3245 



122-7 



39-816 



•0194 



2357 



4-573 



•3920 



119-9 



47-001 



•0245 



206-4 



5-057 



•4715 



117-0 



55165 



•0348 



206-6 



7-190 



•5588 



1140 



63-703 



•0438 



195-5 



8-863 



•6226 



112-4 



69-980 



•0604 



179-9 



10-866 



•7405 



111-0 



82-195 



•0841 



161-1 



13-548 



•8830 



108-2 



95-540 



•0903 



1530 



13-816 



•9576 



107-0 



102-463 



•1000 



1500 



15-000 



1-0672 



103-8 



110-775 



•1520 



137-8 



20-946 



1-1440 



102-7 



117-489 



•1860 



133-2 



24-775 









Table II. — Coal-gas. 



Length of 



spark, in 



centimetres. 



Electro- 

 static force, 

 per centim. 



C.G.S. 



Total force, 



in C.G.S. 



units. 



Length of 



spark, in 



centimetres. 



Electro- 

 static force, 

 per centim. 



C.G.S. 



Total force, 

 in C.G.S. 



units. 



•0060 



291-6 



1-750 



•3439 



117-7 



40-477 



•0144 



235-0 



3-384 



•3601 



1170 



42-132 



•0255 



212-6 



5-421 



•4268 



112-7 



48-100 



•0340 



205-5 



6-885 



•4708 



110-4 



51-976 



•0451 



1781 



8-032 



•5430 



107-9 



58-590 



•0546 



177-9 



9-713 



•5586 



107-6 



60-105 



•0679 



166-5 



11-305 



•6325 



107-0 



67-677 



•0863 



1566 



13515 



•7450 



103-9 



77-405 



■0958 



150-9 



14-456 



•8410 



100-6 



84-604 



•1240 



1430 



17-732 



•8760 



99-4 



87-074 



•1590 



130-9 



20813 



•9791 



97-0 



94-973 



•1953 



1271 



25-799 



1-0676 



94-9 



101-315 



•2244 



128-4 



28-813 



1-1858 



92-4 



109686 



•2840 



122-9 



34-904 









