Abstract
Summary
The observation that exposure to X irradiation causes partial dissolution of cell spindles and that chromosomes in the destroyed area become pycnotic led to this study of the living spindle. Photographs of grasshopper testis, living cells that have been immersed in Belar solution show spindle fibers and the attachment of some of these fibers from the centrosome to the chromosome. The reality of the spindle in fixed tissue, as revealed by phase contrast microscopy, is emphasized as a result of these studies. Prior to this experiment, Schmitt and Belar were also able to show the birefringence of spindle fibers.
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