CONTENTS. 



xm 



294. 



295- 



296. 

 297. 

 298. 

 299. 

 300. 

 301. 

 302. 



303- 

 304- 



305- 

 306. 



307- 

 308. 



309- 

 310. 



311- 

 312. 



3^3- 

 314- 



315- 

 316. 



317- 

 318. 



319- 

 320. 

 321. 

 322. 



323- 

 324- 



325- 

 326. 



327- 

 328. 



329- 

 330- 

 331- 

 332. 

 333- 

 334- 

 335- 

 336. 

 337- 

 338- 



Data for voltaic cells : (^) secondary (storage) cells . . . . 

 Contact differences of potential, solids with liquids and liquids with 



liquids in air 



Contact differences of potential, solids with solids in air 

 Potential difference between metals in various salt solutions 

 Thermoelectric powers 



" " with alloys 



" " " platinum 



<' '* of Pt. with Pt. Rh. alloys 



Peltier effect 



" " Fe-constantan, Cu-constantan 



" " E. M. F. in volts . 



Various determinations of the ohm 

 Specific resistance of metallic wires . 

 Specific resistance of metals 

 Temperature resistance coefficient 

 Conductivities of three-metal and other alloys 



" alloys .... 

 Allowable carrying capacity rubber-covered copper wires . 

 Resistance of metals and alloys at low temperatures . 

 Temperature variation of electrical resistance of glass, porcelain 

 Temperature resistance coefficients of glass, porcelain, quartz 



Tabular comparison of wire gages 



Wire tables. Mass and volume resistivities of Cu. and Al. 

 " " Temperature coefficients of copper 



" *' Reduction to standard temperatures 



" " Standard annealed copper wire, English units 



<' " " " " " metric units 



" " Hand-drawn aluminum wire, English units . 



" " " " " " metric units 



Dielectric strength ; steady potential for spark in air . 



" " alternating potential for spark in air . 



" " potentials for longer sparks in air 



" *' effect of (air) pressure .... 



" ** of various materials .... 



" ** " kerosene ...... 



Electric resistance with alternating currents (straight wires) 

 " " for high frequencies .... 



Wireless telegraphy ; wave-lengths, frequencies, oscillation constant 



" " radiation resistance for various wave-lengths 



International atomic weights and electrochemical equivalents 



Conductivity of a few dilute solutions 



Electrochemical equivalents and densities of nearly normal solutions 

 Specific molecular conductivity of solutions .... 

 " " *' " " limiting values 



" " " *' ** temperature coefficients 



263 



