The Art of projection and complete magic lantern ... - Yesterday Image

48be necessary to glue a thin piece of wood on nine out of every dozen, tobring it up to the level of top and bottom rail of frame.By putting the piece of card at the bottom the slide is raised, as it iseasier to take a shaving off the bottom of frame with a plane, than it is toglue a piece on, which you would find necessary if any other method isused. It may be necessary to cut away the edges of the frame in thecentre as they overhang, especially in circular mounted slides, thisis easily done with a chisel or pocket-knife. In the case ofmechanical frames, when inverted for placing m the lantern, alllever handles and slips should come to the right hand. Endeavourto arrange effects in this manner because it will save a lot of troublein working, especially if one pair of hands has all the operatingto do. If this cannot be done, reverse the framed or set slide, whichcomes previous, so that its painted side, instead of the cover glass, comesnext to the condenser. When registered, glue or gum a piece ofwhite paper, about one inch square, on the frame and mark in good boldblack figures, i 2 j and so on. This paper should always be in oneplace, so that it may be a guide in the dark, and prevent slides beingplaced the wrong end up in the lantern.Another difficulty in registering is the varying sizes of the masks ormats, these should always be kept one size, and in preference, shouldbe circular for the reason that they are easier to register than cushion orsquare mats, also because a square picture is optically incorrect ; it isnot to be expected that a true square picture can be thrown by a circularlens, there is sure to be a slight tendency of the edge of the disc to bethrown out of the perpendicular, more especially with short focus lens,of course, this can be overcome by using long focus lens of a widediameter, the lens in that case being of a wider diameter than the slideopening. If the mats which are to be used are circular, they should notbe smaller than 2 ia""- in the opening, if possible keep them all 3 inches.It will frequently happen when registering effects that the painting maybe made to register, but the mats will not allow of the edges to superimpose,this being the case, the slide must be unbound and the matshifted until it is right ; it is a tedious task, but must be done if slidesare to register properly.TOOLS FOR REGISTERING EFFECTS.Before commencing to register and true up effects, the following oddtools are necessary.—Glue Y>^\.,Jig 8 (a small copper one is handiest asit is quickly heated) ; bradawl,yf^. j ; screwdriver,^/^-, i ; one-inch chisel,fig. 2 ; triangular file, fig. 4 ; vl small American iron plane, fig. 7 / some