f interest. Whole ma- When two oxyhydrogen burners are used, they are chines of a suitable size, and parts of machinery, or arranged at one side of the megascope box, at slightly apparatus of almost any kind may be shown to advan- different elevations, and a short distance apart to tage in this… … cus. They are not expen- mounted in a soft CLOSED. sive, and may be obtained wood ring, and 1s. 10d. per 1,000 feet. This is equal to 42 and 44 cents of a diameter of six or seven inches. suspended over a circular aperture in the front of the respectively, and in both cases the business is done at…
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