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To Represent Cascades Of Fire


In cutting out cascades, you must take care to preserve a natural

inequality in the parts cut out; for if, to save time, you should make

all the holes with the same pointed tool, the uniformity of the parts

will not fail to produce a disagreeable effect. As these cascades are

very pleasing when well executed, so they are highly disgusting when

imperfect. These are the most difficult pieces to cut out.



To
roduce the apparent motion of these cascades, instead of drawing a

spiral, you must have a slip of strong paper, of such length as you

judge convenient. In this paper there must be a greater number of

holes near each other, and made with pointed tools of different

dimensions.



At each end of the paper, a part of the same size with the cascade

must be left uncut; and towards those parts the holes must be made at

a greater distance from each other.



When the cascade that is cut out is placed before the scroll of paper

just mentioned, and it is entirely wound upon the roller, the part of

the paper that is then between being quite opaque, no part of the

cascade will be visible; but as the winch is gently turned, and

regularly round, the transparent part of the paper will give to the

cascade the appearance of fire that descends in the same direction;

and the illusion will be so strong, that the spectators will think

they see a cascade of fire; especially if the figure be judiciously

cut out.



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