Micrographia : containing practical essays on reflecting, solar, oxy-hydrogen gas microscopes; micrometers; eye-pieces, &c. &c. (1837)
Goring, C. R., 1792-1840, Pritchard, Andrew, 1804-1882, joint author · London : Whitaker and Co. · leaf 190
to obviate spherical aberration also. In the solar micros-cope, this combination has been used with considerable advan-tage ; and there can be little doubt, that, for all scientific pur-poses where the utmost definition and correctness are required,it is by far the most perfect construction of any… … 178 THE MICROGRAPHIA. for the solar; and so it would, as far as the two instrumentscorrespond: but since the angle of the field ofview in theformer is generally much less than that in the latter, an achro-matic object-glass suitable to the one may be wholly unfit forthe other, and thus be found…
Microscopy
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