[Clarke, William], 1800-1838 · Boston, Munroe and Francis · leaf 124
convenient,and (;annot be rolled without cracking, and becoming, in a short time,useless; therefore, nothing can be better for tlie purpose than the former. OPTICAL AMUSEMENTS. 121 SOLAR MICROSCOPE. The solar microscope is constructed in the following manner. In the in-side of a tube is placed a… … A broad lens, C D, is placed before the object, to collect the solar rays,for the purpose of illuminating it more strongly, and, consequently, makingtlie image more distinct and vivid. TO CONSTRUCT A LANTERN WHICH WILL ENABLE A PERSON TOREAD BY NIGHT AT A GREAT DISTANCE. Make a lantern of a…
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