Making Ice

Ingredients

• 2 lb Glauber salts (sulphate of soda)
• ½ lb Sal ammoniac
• 1 lb Saltpetre
• 10 pints of water

Directions

1. Place the agitator tightly on the bottom of the freezer.

2. Fill the cylinder with pure water and insert it into the machine.

3. Add the Glauber salts, then the water, followed by the saltpetre and sal ammoniac, all well pounded.

4. Pour 1 to 1½ pints of the prepared mixture into each freezer and start the machine by turning the handle.

5. After 10 to 12 minutes, draw off the first charge into the cooler below and immediately recharge.

6. If the second charge is insufficient, add a third charge.