ABSTRACTS OF SCIENTIFIC PAPERS 



353 



PART I. INTRODUCTORY. 



Objects of treatise. Standard mechanical units. 



Derivation of units from fundamental Dimensions of derived units, 

 standards. 



PART II. THE MEASUREMENT OF MAGNETIC PHENOMENA. 



Magnets and magnetic poles. 

 Magnetic field. 

 Magnetic moment. 

 Intensity of magnetisation. 

 Coefficient of magnetic induction. 



Magnetic potentials and equipotential 



surfaces. 



Lines of magnetic force. 

 Relation between lines of force and 



equipotential surfaces. 



PART III. MEASUREMENT OF ELECTRIC PHENOMENA BY THEIR 

 ELECTROMAGNETIC EFFECTS. 



Preliminary. 



Meaning of the words ' electric quan- 

 tity.' 



Meaning of the words ' electric cur- 

 rent.' 



Meaning of the words ' electromotive 

 force.' [ance.' 



Meaning of the words 'electric resist- 



Measurement of electric currents by 

 their action on a magnetic needle. 



Measurement of electric currents by 

 their mutual action on one an- 

 other. 



Weber's Electro-dynamometer. 



Comparison of the electromagnetic 

 and electrochemical action of cur- 

 rents. 



Magnetic field near a current. 



Mechanical action of a magnetic 



field on a closed conductor convey- 

 ing a current. 



General law of the mechanical ac- 

 tion between electric currents and 

 other electric currents or magnets. 



Electromagnetic measurement of elec- 

 tric quantity. 



Electric capacity of a conductor. 



Direct measurement of electromotive 

 force. 



Indirect measurements of electromo- 

 tive force. 



Measurement of electric resistance. 



Electric resistance in electromagnetic 

 units is measured by an absolute 

 velocity. 



Magneto-electric induction. 



On material standards for the mea- 

 surement cf electric magnitudes. 



PART IV. MEASUBEMENT OF ELECTRIC PHENOMENA BY STATICAL 



EFFECTS. 



Electrostatic measure of electric 

 quantity. 



Electrostatic system of units. 



Ratio between electrostatic and elec- 

 tromagnetic measures of quantity. 



Electrostatic measure of currents. 



Electrostatic measure of electromotive 

 force. 



Electrostatic measure of resistance. 



Electric resistance in electrostatic 

 units is measured by the recipro- 

 cal of an absolute velocity. 



Electrostatic measure of the capacity 

 of a conductor. 



VOL. n. 



Absolute condenser practical mea- 

 surement of quantity. 



Practical measurement of currents. 



Practical measurement of electromo- 

 tive force. 



Comparison of electromotive forces by 

 their statical effects. 



Practical measurement of electric re- 

 sistance. 



Experimental determination of the 

 ratio r between electromagnetic 

 and electrostatic measures of quan- 

 tity. 



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