Continuing with yesterdays post on Measuring cups I found this description in Houghtalings Handbook of Useful Information ©1884
Weights and Measures for Cooks, eto.
1 pound of Wheat Flour is equal to 1 quart
1 pound and 2 ounces of Indian Meal make 1 quart
1 pound of Soft Butter is equal to 1 quart
1 pound and 2 ounces of Best Brown Sugar make 1 quart
1 pound and 1 ounce of Powdered White Sugar make 1 quart
1 pound ol Broken Loaf Sugar is equal to 1 quart
4 Large Tablespoonfuls make 1/2 gill
1 Common-sized Tumbler holds 1/2 pint
1 Common-sized Wine-glass is equal to 1/2 gill
1 Tea-cup holds 1 gill
1 Large Wine-glass holds 2 ounces
1 Tablespoonful is equal to. 1/2 ounce
A gill is (according to the Free Online Dictionary) a unit of liquid measure equal to 1/4 pint or 4 ounces. With regard to dry measure it is equal to 1/4 of a British Imperial pint. Which in today's measurements would be 1/2 cup.