520 



ENGINEERING ON THE FARM 



use the metal of the engine as a part of the circuit. An 

 anti-freezing solution may be neutralized so that it is non- 

 corrosive and safe from electrolytic action at ordinary 

 temperatures, but may break down and become unstable 

 when heated to the temperatures attained in the water 

 jacket. Alcohol with water, alcohol with water and glycerin, 

 and kerosene are harmless and safe anti-freezing liquids. 



Freezing Points of Calcium Chloride Solutions 



Freezing Points of Denatured Alcohol Mixed 



with Water 



Freezing Points of Alcohol and Glycerin Mixed 



with Water 



