Histopathological changes in the foetal and infantile inner ear caused by maternal rubella.

An improved method of banking the donor material at low temperature is described, entailing the immersion of the cornea with an attached rim of sclera in medium containing dimethyl sulphoxide. The storage temperature is that of liquid nitrogen (1960 C.) instead of that of solid carbon dioxide (79° C.), as formerly used. Though the results with deep-frozen donor material were superior to those with fresh material, many further trials will be needed before this apparent superiority of frozen material can be established. But it can reasonably be concluded that deepfreezing provides a satisfactory method of preservation, and should eliminate the present wastage of this valuable donor material