Fig. 6.—Another type of indoor fireworks with changing views.
At first only the central “Catherine wheel” is seen by the audience. Then, on the wire to the left being pulled, and the cardboard to which it is attached raised, a fountain of fire shoots into the air and bursts into a number of stars. A similar occurrence takes place on the right, and by pulling the central wire the “Catherine wheel” is made suddenly to vanish and give place to the spectacle depicted at D.
Care should be taken when manipulating these “mechanical” fireworks that the hand does not come between the light and the framework.
Of course, on the above principles, numerous other designs may be made for the show, and a stock of “fireworks” manufactured that will dwarf any supply.
CHAPTER XLIX
HOW TO MAKE A TELEPHONE
For Use at Home
It is quite easy to make a telephone, which besides affording amusement, will, at times, be found extremely useful. Fitted from the ground floor to the rooms above, or from your friend’s house to your own, it is impossible to overestimate its convenience.
Fig. 1a.—Section of case.