Beck, Conrad, 1864- · London, R. & J. Beck, Ltd. · leaf 83
llumination there wiU always be fine specks of dustilluminated as brilliant points; one which is so small as to showno apparent outline or shape should be selected and be placednear the centre of the field of view. It should then he focussedbackwards and forwards, and the image examined on each… … on either side. If it is out of adjustment, one side wiU be clearand the other side hazy. Fig. 89 shows that if aU the light OBJECT GLASSES AND EYBPIEOES 81 from the object glass is not coming to the same point, the illu-mination will not be equally distributed at the two positions(A and B). It is…
Microscopy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
