1851 Great Exhibition: Official Catalogue: Class VIII.: John MacDonald
From Graces Guide
329. MACDONALD, JOHN, 13 Henry Street, Vauxhall — Inventor.
Binnacle and ship's compass; intended to reduce local attraction; to neutralize the dip of the needle; to give an extraordinary binnacle light; speedy adjustment of the bowl; and to enable an azimuth to be taken at any hour of the day or night.
Engine pump for various important ships' purposes, with double cylinders, worked with new single valve, and parallel motion.
Silent water-closet, and exhauster of effluvia; acting without trap.
Steam chest and valve, applicable to double cylinders.
Lantern and lamp for ship's head, and general purposes. This lamp throws a reflection of light from 160 degrees of its circle.
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