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How to connect up a Dissolver. No. II.—Trieuez.
MITH a triple lantern, unless the lantern is fitted with the two stand-pipes spoken of, the connections become much more elaborate; but of this we will speak later on.
the two stand-pipes alluded to, one six-way and one four-way dissolver can be used being connected up much in the samé manner as shown in the first illustration ;
but in’ this case connection is made with the |
central or inlet tubes of the dissolver, from the stand-pipes as shown in Fig. III.; whereas for the top lantern jet connection is made from the top of the stand-pipes as shown.
Fig. LV. shows what we consider to be a more satisfactory method of connecting up, and this is done by means of three four-way dissolvers. Each lantern is thus controlled by its own tap, and dissolving to or from A, B, or c, is rendered a very simple matter.
Should the lantern body not be provided with stand-pipes, the various connections can be made with fwo six-way dissolvers after the style shown in Jig. V. In this instance, con
The Optical Magic Lantern Journal and Photographic Enlarger. 838
nection from the gas cylinders is made at the central inlet tubes, and one outlet on either side is then connected up with the inlet of the other
| dissolver, The proper manipulation of the bye| pass taps will be quite apparent on proceeding | to light up.
Se COY fe Greek see
For Acetylene Users.
| WS oe a recent lecture before the Royal
Photographic Society, Prof. Vivian B. Lewes dealt concisely, yet exhaustively with acetylene, both from the historical and practical points of view, and his entire discourse is well worthy of careful study by all who use or intend to use this most useful gas. The following points are of particular interest :—
THE APPEARANCE OF THE REsipuE.—This gives an unfailing indication of the performance of the generator. Given a well-designed generator in which the carbide is decomposed without undue heating, the residue will be a pure white lime. With a generator. in which