Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 36
Fig. 9.—Action of a pair of prisms with their apices in contact on parallel light. 12 ELEMENTARY PRINCIPLES OF MICROSCOPICAL OPTICS It must, however, be understood that there is a very importantdifference between the action of spherical lenses, ivhich is due to thedifferent position of the normals.…
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep02muss-131-37.webp)
