Modern microscopy; a handbook for beginners and students (1912)
Cross, M. I, Cole, Martin J · Chicago, Chicago Medical Book Co. · leaf 132
n to it.For the illumination of opaque objects on the stage of the micro-scope, a brilliant point of light is required. Fig. 49, B, shows that ILLUMINATION AND ILLUMINATING APPARATUS 111 to secure this the bulls-eye should be set midway between theillunrinant and the object. It will be obvious that… … Fig. 48.—Stand Condenser. object may not be too pronounced. For certain work, however,it is necessary to obtain a parallel beam with a bulls-eye ; to dothis the light must be set in the principal focus of the bulls-eye,as shown in Fig. 49, C. This arrangement will often be founduseful for…
Microscopy
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