Definition of "guhr" [guhr]

• A loose, earthy deposit from water, found in the cavities or clefts of rocks, mostly white, but sometimes red or yellow, from a mixture of clay or ochre. (noun)

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• "The dry guhr can, of course, be examined, either qualitatively or quantitatively, for other mineral salts, such as carbonate of soda, &c. An actual analysis of dynamite No. 1 made by the author at Hayle gave --"
• "In this case a small quantity of barium sulphate, say about 1 per cent., should be added to the guhr."
• "In a series of lead-lined tanks the guhr is weighed, placed in a tank, and the nitro - glycerine poured on to it."