Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 82
o issue from the object in two separate pencils,which will strike the surfaces of the two prisms. This con-sists of two deep cylindrical lenses a and b, whose focal lengthsare as 2*3 to 1, having their curved faces opposed to eachother, as shown in section at c; the larger and less _ convexbeing… … 33 OPTICAL PRINCIPLES OF THE MICROSCOPE.
Microscopy · Biology
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