Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 404
346 Chemistryy Physics^ Technology, etc. of spherical aberration. This, however, is a mistake, which Herschelhimself has rectified in his memoirs. ^ We now come to the most important method of correcting sphericalaberration, that is, by a second lens of opposite character. Supposewe want to correct…
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