Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 441
e of the stern art of war. The mirrors areemployed, not like those of Archimedes, to send back the sunbeams fromevery side, and by their concentration at one spot to set on fire the enem/sworks, but to enable the artillerymen in a battery to observe the effect oftheir shot, and the movement of… … Fig. igZ.—Apparatus for Ghost Illusion. to view), and it consists simply, as shown in the figure, of two plane mirrorsso inclined and directed, that in the lower one is seen by reflection the loca-lities which it is desired to observe. We return once more to the arts of peace, in noticing the…
Inventions
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