Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 403
344 Chemistry, Physics, Technology, etc. tea: … ducod by the shorter marginal rays, K R, after crossing the axis, di-verging, and is also called the circle of aberration. //, the distanceof the difference of the central and marginal rays, constitutes thelongitudinal aberration. The least spherical aberration is where thetwo cones intersect each…
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