There are many types of permanent waves. First there are two methods of winding—spiral and croquignole. The spiral kind of winding is that done on long rods similar t pencils, This wind gives excellent waves, but does not give the self-setting end curl which croquignole winding gives. With—croquignole winding the curlers are placed parallel t) the scalp and the hair is wound from the ends to the roots, the reverse to spiral. A combination wave is spiral curlers on top for wave, and croquignole around the back and sides for curls.
Then there are the methods of producing heat. There are machines in which you have heaters placed ver your head that are connected by Wwires to the electricity; non-electric machines in which the hair is wet with solution and the heaters are placed directly from a hot machine on to the head; machineless methods in which chemical heating pads are used, and steam machines in which rubber tubes are connected to your head from a boiler on the wall.
Text read from the printed page and cleaned; old type leaves the occasional error.