36 SCIOPTICON MANUAL. Beginners who wish to understand and operate the Sciopticon by explanations and directions which can be seen at a glance, may examine in connection with Fig. 15, the following RECAPITULATION. The front, h h h't with its attachments, draws apart from the body of the instrument. The stage o o' lifts out. The condenser, p q, is drawn out by laying hold of the ring r. The cells holding p and q draw apart. The front flame-chamber glass G is held in place by the spring A, which can be reached through the open¬ ing over A. With h o p q G removed, the narrow glass F (found packed with the extra wicks) is reached to position, and needs no further attention. The portion of chimney attached to the cap J, tele¬ scopes into /. The lamp S slides out horizontally, by raising the spring X. With packing removed, glasses clean, lamp filled two- thirds full of standard kerosene oil, and all parts in place as seen in the cut, remove the back glass G\ and reach the wiqks v v with a lighted match. Beplace G', and let the flames stand about one inch hio-h. o See, specially, that an oil so inflammable as to light at the safety slit u is not used—that no oil is left outside the lamp-cup, to give off an offensive smell—that the wicks at v v are not raised to rub against the plate E" when the lamp slides in and out—that the flame-chamber glasses G G' are in place to secure draft, and that the