Schedule of Classification 



Magnetic Properties of So- 

 lutions 625 



5470 Diamagnetism ... 625-627 

 Diamagnetic Polarity ... 625 

 Diamagnetism and Mag- 

 netism 625 



Diamagnetism of Various 



Substances ... 625-626 



Theories of Diamagnetism 627 

 5480 Physical Theories of the ' 



Nature of Magnetism 627-628 



Ampere's Theory 627 



5490 Theories concerning the 



Terrestrial Magnetic Field 628-629 



The Electric Current and Conduction. 



5600 General 629-633 



Currents 629-632 



Effect of Current on 

 Physical Properties of 

 Conductors ... 629-630 



Experiments 630 



Opposite Currents, Co- 

 existence in same Wire 630-631 

 Production of Currents 631 

 Velocity of Electricity 63 1 -632 

 Voltaic and Static Elec- 

 tricity 632 



5610 Theory and Construction of 



Primary Cells ... 633-654 



Chronological List of some 



Cells 633-634 



Construction ... 634-644 



Bichromate Cells ... 635 



Carbon- Consuming Cells 35-636 

 Constant Cells ... 636-637 



Copper Oxide Cells ... 637 

 Dry Cells ... 638-639 



Zamboni Pile 638-639 



Experiments ... 639-640 



Gas Batteries. (See also 



5620.) 640 



Improvements ... ... 640 



Leclanche Cells . . . 640-641 



2-Liquid Cells ... 641-643 



Bunsen Cells ... 641-642 



Daniell Cells 642 



Grove Cells 643 



Currents 644-645 



Currents, Quantity ... 645 

 Electromotive Force. (See 



also 6210.) ... 645-647 



History 647 



Internal Resistance ... 647 



Phenomena ... ... 647 



Polarisation ... 647-648 



Depolarisers ... 647-648 



Mechanical Depolarisa- 



tion 648 



Uses 648-649 



Theory of Primary Cells 649-654 



Electromotive Force ... 650 



SeatofKM.F. ... 650 



Chemical Theory 652-653 



Contact Theory. (See 



alsob-210.)... 653-654 



Volta's Fundamental 



Experiment . . . 654 



5620 Theory and Construction of 



Secondary Cells 654-659 



Cells 654-658 



Charge 655 



Electromotive Fbrce ... 656 

 Gas Cells. (See also 



5610.) 656-657 



Plante Cells ... ... 657 



Plates of Cells 658 



Theory of Secondary Cells 658-659 

 5630 Ohm's Law. Divided Cur- 

 rents and Networks of 

 Linear Conductors 659-663 

 Ohm's Law ... 659-662 



Coupling of Battery Cells 659-660 

 Current Distribution ... 660 

 Resistance. (See also 



5640.) ... 661-662 



Wheatstone's Bridge... 661 



Divided Currents 662 . 



Kirchho/'s Formulae ... 662 

 Networks of Linear Con- 

 ductors ... 662-663 

 Current Distribution in 



Networks 

 5640 Methods of Comparison of 



Resistances 

 Apparatus for Measuring 



Resistance ... 663-665 



Bridges 663-664 



Wheatstone's Bridge. (See 



also 5630.) ... 663-664 



Telephone. ( Use in Mea- 

 surement of Resistance.) 665 

 Measurement of Resistance 665-668 



Cables 665 



Cells, Internal Resistance 666 

 5650 Standards of Resistance. Ab- 

 solute Determination 668-671 

 Standards of Resistance 668-669 

 British Association 



Standards 668 



Ohm 669 



Siemens's Mercury Stan- 

 dard 669 



Standard Resistance Coils 669 

 Absolute Determination 670-671 

 British Association Unit 670 

 Ohm Determination . . . 670 

 Siemens's Mercury Unit 671 



5660 Specific Resistance. Relations 

 to Temperature, Torsion, 

 Magnetism, Light, etc. 671-681 



