PURE SCIENCE 
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ther, 
534 Sound Acoustics 
JI Theory Undulations 
% Propagation of sound: velocity, diffraction 
Musical sound Tuning forks See also 781.1 Theory of music 
Analysis of sounds Resonators 
Superposition of vibrations 
Grafic representations 
Physiologic: ear and larynx 
For other relations see Ear, Larynx, in Relativ index following Tables 
Applications Preferably clast with topics elsewhere See 532.8, note 
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Signals in navigation See also 654.0 Communication 
Applications to architecture 
Musical instruments See also 780 Music 
Phonograf 
Tables Problems - Questions 
Light Optics 
Theory 
Propagation Velocity Mesurement of light 
Reflection Refraction Absorption 
See also 522.92 Astronomy 
Dispersion Diffraction Interference 
Polarization Polariscope Double refraction 
Color 
Physiologic: eye 
Optical principles of sight. See also Eyes in Relativ index 
Applications Preferably clast with topics elsewhere See 532.8, note 
Lenses and prisms 
Microscopes and magnifiers See also 578 Microscopy 
Telescopes See also 522.2 Astronomy 
Spectroscopes and spectrum analysis 
Most general number. See also Spectroscopy, Spectrum, in Relativ index for 
other relations and applications 
Photografy See also 770 
Other applications of lenses 
Mirrors and reflecting instruments 
Lighthouses See also 627.0 Harbor engineering; 656 Commerce 
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Tables Problems Questions