carbon bisulphide glass prism, angle 60 degrees, by William Ladd, London, England, 1870. carbon bisulphide glass prism, angle 60 degrees, b Optics 1870
Adjustable angle liquid prism with detachable glass prism by Ducretet et Lejeune of Paris, C. 1870 Adjustable angle liquid prism with detachable glas Optics
Direct-vision dispersing prism consisting of two glass prisms enclosing a prism-shaped space for filling with a highly-refracting liquid Direct-vision dispersing prism consisting of two g Optics
