Modern microscopy; a handbook for beginners and students (1912)
Cross, M. I, Cole, Martin J · Chicago, Chicago Medical Book Co. · leaf 86
f a window, and using bulls-eye condensers to increasethe light. The draw-tube carrying the special objective and the eyepieceis then replaced in the body of the microscope, and the image ofthe pointers b in Fig. 23 is brought sharply into focus in thecentre of the field by slowly extending the… … 0 2 0 0.2 nD = 1.615 n 7~:~~ Abbes T C.Zeiss Jena. Aoertometer.
Microscopy
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