Volume 1

Lectures on polarized light, delivered before the Pharmaceutical Society of Great Britain; and in the Medical School of the London Hospital / [Jonathan Pereira].

  • Jonathan Pereira
Date:
1843
Catalogue details

Licence: Public Domain Mark

Credit: Lectures on polarized light, delivered before the Pharmaceutical Society of Great Britain; and in the Medical School of the London Hospital / [Jonathan Pereira]. Source: Wellcome Collection.

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    TABLE OF CONTENTS. Ppfroductory, Remarks -'. veccivscseivensdoatadicas vate Sig tiehaliy chiaaneds iriegteeee 1 1, GENERAL STATEMENT OF THE PuysicaL PRopEeRTIES oF LIGHT.— 1. Propagation. 2. Intensity, Photometry, Wheatstone’s Photometer. 3. Transparency and Opacity. 4. Reflection. 5. Refraction. 6. Dis- persion, the spectrum, primitive and compound colours, comple- mentary tints, formation of white light, possible existence of a second spectrum, achromatism, Fraunhofer’s lines. 7. Diffraction. 8. Colours of thin plates, of films, and of grooved surfaces, Newton’s. Fits, Nobili’s Metallo-Chromes, Reade’s Iriscope. 9. Double Refraction. 10. Polarization, methods of effecting it, by reflection, by single refraction, by double refraction, by the tourmaline .............00sse00s 3—-20 2. Wave Hyporuesis.—Light a property or motion, not a matter. Ether, its existence assumed, its supposed resistance to the motions of the planets, retardation of Encke’s comet. Ethereal Molecules. Waves, lengths for different colours ; comparative range of sensibility of theeyeandear. Vibrations, rectilinear, circular, elliptical. Powell’s machine. Doctrine of transversal vibrations. Partially polarized light. Interferences of Light, Young’s experiments ; his sliders, circular and elliptical waves how formed. Wheatstone’s illustrative APPAaratus ......00- edad ceaetneneonedtsccapacepes vaanseodenacea taney] « teveesreseest0—do LECTURE II. 3. CoLouRED PoLarizaTIon.—Polariscope ; polarizer, depolarizer, and analyzer. Colours of thin plates by polarized lights. Theory of their production. Selenite, description of, its optical properties, RT EIR a5 5 Mia saa ck condemn <samybitinade Ria its Catia cet asthe Ae ue sei tas .34—41 Double refraction, test of, its cause. Effect of compression, and unequal heating or cooling in producing double refraction, chromatic dyna- mometer, chromatic thermometer. Properties of unannealed glass. Practical application of the preceding statements. Argument for the vegetable origin of the Diamond. Doubly refractive power of starch grains and other organic substances .........scecerevseevsersesves 41—50 LECTURE III. Crystals, their doubly refractive power ; uniaxial and biaxial crystals ; positive and negative axes. Forms of crystals ; crystallographical axes, Classification of crystalline forms. EH xpansibility of crystals ; Mitscherlich’s experiments. Atoms of crystals; opinions as to their shape, probability that the atoms are susceptible of alteration of form. Molecular forces ; elasticity of crystals, Savart’s experiments thereon. General conclusions ...... seeedacdteatemmiuy cameynne Aah ak 50—64