ost in- smaller lenses of 19 68 inches ot focal distance. valuable one for ship charts. If used on bank inclined inwards towards the lamp, which is bills it would bea most efficient means of also their common focus, and thus forming by preventing fraud, inasmuch as no alteration their union a… … One of the greatest improvements for the ken out in England in the name of Mr. New. easily oxydized of the.two. This plan was ton, the agent there, and not that of Mr. Gilli- beams rising upwards at an angle of 50° in- land—a system pursued in England which we tury, is the employment of lenses, for…
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