Minimum deviation for uniaxial prisms.

Formulas for the minimum-deviation angle when the optical axis is contained in the incidence plane have been developed. The variation of the minimum-deviation angle as a function of the direction of the optical axis has been analyzed, and it was verified that the width of the incident beam was the same as the width of the emerging beam for the extraordinary rays as well.

Coexpression of simple epithelial keratins and vimentin by human mesothelium and mesothelioma in vivo and in culture.

We have determined the intermediate filament proteins present in normal and malignant mesothelium in vivo. Pure sheets of normal lung mesothelium were obtained by transfer to agarcoated slides or by gentle scraping and cytocentrifugation. Cytoplasmic filament networks in the mesothelium were labeled via indirect immunofluorescence both by anti-Mr 40,000 keratin and anti-vimentin antisera.