To Make and Calibrate a Homemade Hydrometer
Need: Chewing Gum, Drinking Straw, Distilled Water, Sugar
1) Chew Gum and put on one end of straw so that it is airtight
2) Measure out 100 ml of water and place the hydometer in marking the waterline as 0 °Bx or a specific gravity of one
3) Remove...