A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures (1848)
Quekett, John, 1815-1861 · London, H. Bailliere · leaf 367
the next tube I carries the object-glass0, and is moved up and down by rack and pinion, the latterbeing connected with the milled head L; by means of thisthe focal adjustment is made. The third tube K, carrying the … 215. DISSECTION OF ANIMAL TISSUES. 327 eye-piece n at its upper and an erector at its lower end,is also moved up and down by rack and pinion, by turningthe milled head I/. By the employment of an erectorat the lower end of the tube K, this microscope becomes, inevery respect, similar to the…
Microscopy
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