Bartender's Manual by Theodore Proulx (1888, p.38) — Theodore Proulx 1888

0.5 proportionmilk — milkbase
0.5 proportionSeltzer water — seltzerdilution
  1. Combine half milk and half seltzer in a glass and serve.
Summary
A minimal temperance dairy fizz preserving the bar's non-alcoholic service imagination.

Sea Foam is small but useful because it reminds us that not all meaningful historical bar drinks were alcoholic or elaborate.

Its simplicity is part of the record: the bar's service world included direct milk-and-seltzer combinations without apology.

Compared with Milk Lemonade, this is stripped of citrus and closer to plain refreshment service.

Café Royal Cocktail Book by W. J. Tarling (1937, p.188)

0.5 partgin — Booth's High and Dry Ginbase
0.1 partlemon juice — Lemon Juicebase
0.2 partLillet — Lilletmodifier
0.2 partPrunella — Prunella (Cusenier)modifier
1 littleegg white — white of eggother
  1. Shake.

Invented by J. Summers.

See also: Milk Lemonade, Milk Punch, Soda Cocktail