100 Cocktails: How to Make Them and What to Eat with Them by Anderson Fredericks (1931, p.10)

2 dashlemon juice — Lemon Juiceacid
2 dashorange juice — Orange Juiceacid
2 partgin — Ginbase
1 dashAngostura bitters — Angosturabitter
1 partdry vermouth — Dry Vermouthmodifier
  1. Shake or stir all ingredients cold and serve in a cocktail glass.

See also: Dry Martini