Wright, Mark R., 1854- · London : Longmans · leaf 79
—Draw a semicircleon the table with chalk, graduate it as in fig.52, and arrange the tin tubes along radii each making 45° with thenormal. Place the sensitive flame at the end of one. A, and several 70 Sound damp towels, B, between A and the end of the other tube. Tap twopieces of metal together… … The flame is at once affected by the taps. Remove the 1-eflector,the flame steadies. If a be placed making an angle of 40° with
Physics
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-381-241.webp)
