Cocktail Boothby's American Bar-Tender by Wm. T. Boothby (1891, p.35)

1 servingplain lemonade — The source defines this by reference.base
Whiskey — Only a dash is specified.base
  1. Prepare a plain lemonade.
  2. Dash it with whiskey and serve.

Ice: Cube ice

This is a clear bridge between temperance-style lemonade service and lightly alcoholic long drinks.

The defining move is the whiskey dash into a standard lemonade base.

Related recipes

See also: Texas Lemonade, Plain Lemonade

The source defines it from plain lemonade.