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

i6aid of two screws. The two slots in the diaphragm, through which thescrews are fitted, are to allow of the diaphragm being adjusted from rightto left to meet the angle at which the lanterns are placed.The shutter works in the usual manner giving the illusion of thepictures rolling up and down.A rolling effect for statuary leaving the proscenium always on, may bedone by two lanterns ;in this case, if the operator is at all handy with histools, first a suitable single curtain must be chosen, one showing aproscenium at side and top, obtain a piece of brass, same size as thesmallest side of diaphragm, cut the slots for screws, place the curtainexactly in the centre of condenser, mark off on the sides and bottomof brass piece, where the proscenium meets the inner curtain, then filethe edges and bottom of brass plate to the mark, doing a little at thetime, until you find that on the screen you block out all the curtain withthe diaphragm except the proscenium, in other words, the light, insteadof being entirely shut ofT when diaphragm is down, escapes at the sideand bottom, so that when you have the statue showing in one lantern,have the proscenium of the curtain in the other.you stillIt is well in first experimenting to make a cover for the inner part ofcurtain with a piece of cardboard, and when this is cut exactly, markthebrass from that.DIRECTIONS FOR THE PAMPHENGOS LAMP.When the lamp is to be lighted, throw back the hood or chamber. Thefront lenses should now be cleaned, taking care to replace them exactlythe same as before. Clean the condensers, also taking care that inreplacing them the holes in the cells are at the top.When putting fresh wicks to lamps see that they are perfectly dry andfree from moisture, fill the cistern with best paraffin, crystal, or kerosine,oils— do not use benzoline, colza, or sperm, oils. Cut cottons level withtop of wick tubes.Light the wicks, turned down very low, replace the hood after seeingthat the conoidal glasses are fitted properly, and put the lamp in lantern,placing on metal chimney, which must be drawn out to its full length,1 9 inches—this is very important— and is held firmly on the lamp by twobrass thumb screws fitted to top of lantern body, which by screwing upholds chimney firmly in proper position on lamp. Turn up the wicksslowly and allow them to burn for at least ten minutes before they areturned up to their full height. Take care not to breathe into the lampor the flames will not burn. The flames must then be seen above the