Historical text (1909). Food left in a retained-heat cooker can cool into the bacterial danger zone (below 140°F / 60°C). Bring food to a full boil first, keep the cooker full, and reheat to boiling before serving if it has cooled.

The Fireless Cook Book · 1909

VI — Table of Weights and Measures

2 Cupfuls of granulated sugarequals1 pound
1 Tablespoonful granulated sugarequals 1⁄2ounce
22⁄3Cupfuls of powdered sugarequals1 pound
22⁄3Cupfuls of brown sugarequals1 pound
31⁄3Cupfuls of bread flour not shaken downequals1 pound
1 Cupful of bread flourequals5 ounces
31⁄3Tablespoonfuls flourequals1 ounce
1 Pint of milk or waterequals1 pound
2 Cupfuls of solidly packed butterequals1 pound
2 Tablespoonfuls butterequals1 ounce
2 Cupfuls of solidly packed lardequals1 pound
2 Cupfuls of chopped meatequals1 pound
17⁄8Cupfuls of riceequals1 pound
1 Cupful of riceequals81⁄2ounces
1 Cupful of raisinsequals7 ounces
21⁄4Cupfuls of raisinsequals1 pound
31⁄5Cupfuls of currantsequals1 pound
1 Cupful of currantsequals5 ounces
2 Cupfuls of hominy gritsequals1 pound
2 Cupfuls of sampequals1 pound
1 Cupful of split peasequals8 ounces
1 Cupful of dried beansequals71⁄2ounces
1 Quart of bread crumbsequals7 ounces
1 Cupful peanuts, choppedequals51⁄2ounces
1 Cupful prunesequals61⁄2ounces
1 Cupful dried apricots or peachesequals6 ounces
1 Cupful macaroniequals 1⁄3pound
1 Cupful oatmealequals4 ounces
1 Cupful cornmealequals6 ounces
8 Medium-sized eggs in shellsequals1 pound
1 Medium-sized egg in shellequals2 ounces
10 Medium-sized eggs (broken)equals1 pound
1 Cup almonds, blanched and choppedequals5 ounces
1 Square Baker’s chocolateequals1 ounce
21⁄8Tablespoons saltequals1 ounce
4 Tablespoons pepperequals1 ounce
21⁄2Tablespoons ground gingerequals1 ounce
21⁄4Tablespoons ground cinnamonequals1 ounce