Lantern Slides of Diagrams, Formulæ, etc


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IN Nature of June 29, 1946, p. 879, and several earlier issues, correspondents described methods they had used successfully for writing on glass. Mr. E. H. Leach, University Laboratory of


Physiology, Oxford, states that any ink to which a drop or two of a solution of a synthetic detergent (‘Teepol type) has been added can be used for writing on any clean glass surface. Indian


ink appears to be the most suitable. Some proprietary brands of ink appear to contain synthetic detergent and require no further addition. Glassware and microscope slides can be marked with


such inks.


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