Xll 



CONTENTS. 



255. 

 256. 



257- 

 258. 



259- 

 260. 

 261. 

 262. 



263. 



264. 

 265. 

 266. 

 267. 

 268. 

 269. 

 270. 

 271. 

 272. 



273- 

 274. 



275- 

 276. 

 277. 

 278. 

 279. 

 280. 

 281. 

 282. 

 283. 

 284. 

 285. 

 286. 

 287. 



289. 

 290. 

 291. 

 292. 



293- 

 294. 



295- 

 296. 



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 . ..... 



Electromotive force of standard cells : absolute current measures 

 Data for voltaic cells : (a) double fluid cells .... 



(d) single fluid cells .... 



(r) standard 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 platinum . 



Peltier effect ..... 



Various determinations of the ohm 

 Specific resistance of metallic wires 



" " " metals 



Resistance of metals and alloys at low temperatures . 

 Conductivity of three-metal and miscellaneous alloys . 

 Conducting power of alloys ........ 



Electric resistance with alternating currents (straight wires) 

 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 



Equivalent conductivity of salts, acids, bases in solution 



" *' " some additional salts in solution 



" conductance of the separate ions .... 

 Hydrolysis of ammonium acetate : ionization of water . 

 Dielectric constants (specific inductive capacity) of gases . 



" " temperature 



coefficient 



Dielectric constants (specific inductive capacity) of gases : pressure co 



efficient 



Dielectric constants of liquids 



" " " " temperature coefficient . 



" " liquefied gases ...... 



" " standard solutions for calibrations 



Dielectric constants of solids 



" " " crystals 



Temperature variation of electrical resistance of glass, porcelain . 

 Permeability of iron rings and wire, various inductions 



