INTRODUCTION. xxi 



Syrens, &c. ; vibration microscopes, &c. ; methods of illustrating the nature 

 of musical intervals ; manometric flames, mirrored tuning forks, &c. 



Musical Quality. Illustrations o." the different] quality of the sounds of 

 various instruments, harmonics, and overtones, resultant tones, instruments for 

 studying quality, resonators, phonautographs, &c. 



Musical Instruments Illustrating the above. Methods of exhibiting the 

 mode of vibration of various instruments and the quality of the sounds yielded 

 by them. 



LIGHT. 



Instruments and apparatus employed in teaching, and in the investigations 

 and observations connected with : 



Production. Combustion, electric discharge, &c. 



Measurement of intensity, velocity. 



Action of Matter on Light. Reflexion, refraction, dispersion, achromatism, 

 direct vision prisms, polarisation, absorption (colour), fluorescence, &e. 



Action of Light on Light. Interference, diffraction, measurement of wave 

 length (optical banks), &c. 



Action of Light on Matter. Photography, radiometry, phosphorescence, &c. 



Technical Applications of Optical Principles. Lighthouse. Illumina- 

 tion, &c. 



HEAT. 



Instruments and apparatus employed in teaching, and in the investigations 

 and observations connected with : 



Sources of Heat. Chemical, electrical, dynamical, solar, calorescence, &c. 



Effects of Heat on Matter. Changes of temperature, expansion and change 

 of elasticity, liquefaction, vaporization, &c. 



Measurement of Temperature. Thermometers, pyrometers, &c. 



Propagation of Heat. Radiant heat, Radiometer, reflection, refraction, 

 radiation, absorption, polarization; Conduction, Solids, liquids, gases; Con- 

 vection, Ventilation, &c. 



Effect of change of Molecular State on Temperature. Freezing mixtures, 

 ice machines, &c. 



Effect of change of Pressure and Volume. 



Heat Quantity. Unit of heat, calorimeters, specific heat, &c. Methods of 

 determining latent heat. 



Mechanical Equivalent of Heat Methods of determining. Illustrations of 

 thermodynamics. 



Electrical Equivalent of Heat. Methods of determining. 



Analysis of Solar Radiation. 



MAGNETISM. 



Instruments and apparatus employed in teaching, and in the investigations 

 and observations connected with : 



