Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 154
And the same object is attained byan arrangement devised by Mr. Grubb, a DubKn optician, ofwhich Dr. Robinson of Armagh speaks very highly; the prismhaving its aberrations corrected for a lamp placed at a givendistance in the plane of the stage; and being mounted insuch a manner as to be capable of… … 133 ACCESSORY APPAEATIJS. limited by the construction of tlie stage, and especially by therelation which its thickness bears to the diameter of its loweraperture. The thinner the stage, and the larger its lowerapertu.re, the more oblique wUl be the rays which may betransmitted through it; and in…
Microscopy
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