How do you make lactometer?

* A glass or plastic cylinder

* A hydrometer

* A container of water

* A spoon

* A scale

* A pen or pencil

* Paper

Instructions:

1. Fill the glass or plastic cylinder with water.

2. Place the hydrometer in the water.

3. Add or remove water until the hydrometer floats at the middle of the cylinder.

4. Use a spoon to stir the water around the hydrometer.

5. Wait for the hydrometer to stop moving.

6. Read the scale on the hydrometer.

7. Record the reading on paper.

8. Repeat steps 2-7 for different concentrations of salt water.

The lactometer is now calibrated. You can use it to measure the specific gravity of milk or other liquids.

Here are some tips for using a lactometer:

* Make sure the lactometer is clean and dry before using it.

* Calibrate the lactometer before each use.

* Use a glass or plastic cylinder that is tall enough to hold the hydrometer and at least 1 inch (2.5 cm) of water above the hydrometer.

* Stir the liquid around the hydrometer gently to ensure an accurate reading.

* Wait for the hydrometer to stop moving before reading the scale.

* Record the reading on paper for future reference.