Mistake of Newton in supposing the length of the Spectra to be the same in
all Bodies—And in despairing of the Improvement of Refracting Telescopes
-In his Controversy with Lucas he was on the eve of discovering the differ-
ent dispersive Powers of Bodies-Mr. Chester More Hall makes this Dis-
covery, and constructs Achromatic Telescopes, but does not publish his
Discovery-Mr. Dollond rediscovers the Principle of the Achromatic Te-
lescope, and takes out a Patent-Principle of the Achromatic Telescope
explained-Dr. Blair's Aplanatic Telescopes-Great Improvements on the
Achromatic Telescope by the Flint Glass of Guinant, Fraunhofer, and
Bontemps-Mistake of Newton in forming his Spectrum from the Sun's
Disc-Dark Lines in the Spectrum-Newton's Analysis of the Spectrum
incorrect-New Analysis of the Spectrum by Absorption, &c., defended
against the Objections of Helmholtz, Bernard, and Others-Change in the
Refrangibility of Light maintained by Professor Stokes-Objections to
his Theory,
« AnteriorContinuar » |