Eliza Leslie,
Miss Leslie's Lady's New Receipt-Book…
“ There will be no fatigue, if they are beaten with the proper stroke, and with wooden rods, and in a shallow, flat-bottomed earthen pan. The coldness of a tin pan retards the lightness of the eggs. For the same reason do not use a metal egg-beater. In beating them do not move your elbow, but keep it close to your side. Move only your hand at the wrist, and let the stroke be quick, short, and horizontal; putting the egg-beater always down to the bottom of the pan, which should therefore be shallow. Do not leave off as soon as you have got the eggs into a foam ”
