Cincinnati Cocktail

The Hoffman House Bartender's Guide by Charles S. Mahoney (1905, p.147)

1. Pour one-half glass of beer into a large bar glass.
2. Add one-half glass of soda or ginger ale and serve.

Mahoney explicitly recommends it for warm weather.

How to Mix Drinks by George L. Spaulding and W. Rositer (1906, p.13) — Spaulding and Rositer 1906, cocktails section

1. Fill half a glass with beer and fill with soda water.

Ice: None

Jack's Manual by J. A. Grohusko (1908, p.29) — Grohusko 1908

1. Fill half the glass with beer and top with soda or ginger ale.
2. Serve cold.

Nose

Light malt and carbonation lift simply from the glass.

Palate

This matters because it shows how loosely the word cocktail could still be applied to practical hot-weather refreshers at the edge of the beer-and-highball world.

Finish

The finish is short, cool, and lightly sparkling.

Summary

A minimal beer refresher from the broad highball borderland.

Jack's Manual by J. A. Grohusko (1910, p.45)

1. Pour half a glass of beer.
2. Fill up with soda or ginger ale and serve.

The Buffet Blue Book by John H. Considine (1912, p.28)

1. Fill half a glass with beer.
2. Fill up with soda and serve.

Bartenders' Guide: How to Mix Drinks by Wehman Bros. (1912, p.15)

1. Combine half a glass of beer and half a glass of soda in a large bar glass and serve.