CHART _Name of Play_ Scene I. Overhead lights. Left (as seen from the audience) Right blue, white, white, white, blue Footlights Left Right blue, red, amber, white, red, blue Left strip blue, red, blue, blue Right strip blue, amber, blue, blue Left extension white The stage electrician will need a chart for each scene of your play. The changing of the lights for each scene will be his responsibility. You will probably have little need for baby-spots unless your equipment is very elaborate, and to use them requires almost professional experience. Every boy who is interested in electricity knows that a rheostat or dimmer is used for turning lights off and on gradually. They may be purchased for a small sum or they may be made. Every new play and every new scene presents a new problem for you to solve. You will know that you have solved your problem when, as a group, you can sit before each scene and feel that it is harmonious, that it surrounds the figures with suitable atmosphere, and that your lighting interprets the idea and mood of your play. [Illustration: _From A the current from one wire passes to the stationary electrode C which is submerged in a gallon jar of water containing one eighth teaspoon of ammonium chloride. The graduated electrodes (all connected) are fastened to the wooden bar B which is made to slide up and down the vertical posts at either side. Both sets of electrodes are made of thin sheet copper. By means of the cord (attached to the screw eye in B) which runs over the pulleys D, D down to the spool drum E, the upper electrodes can be slowly let down into the ammonium chloride solution, completing the circuit and increasing it as more of the electrode surface is exposed to the liquid. This dimmer will carry as many lights as your theater will ever require._ ] [Illustration: [Marionette]] [Illustration: [Marionettes]] CHAPTER IX Training Your Puppeteers