with the embryosand it will form a part of the picture and serve as a record. After the picture is satisfactorily made it is wise to number theembryos on the back of the negative with a wax crayon, and laterwhen the negative is dry number on the front with carbon ink.The embryos are placed in… … Fig. 169. Camera and special microscope stand for photographing largetransparent sections. For this the vertical camera is used [Pig. 161) tiiih thecamera reversed on the sliding frame. This frame is elevated sufficiently toutilize the sky as background and illuminant. The special microscope…
Microscopy
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