860 



DR S. M. JOHNSTON ON THE BOILING AND FREEZING POINTS OF 



10 IS 20 2S 30 35 40 15 SO 55 60 65 70 75 80 85 90 35 100 105 ilO 115 110 125 130 135 110 115 150 155 ISO 165 170 



GRAMMES SALT ADDED TO 100 GRAMMES WATER 



Yin. 3. 



