10 



ANNALS NEW YORK ACADEMY OF SCIENCES 



In the third experiment a solution of three-fonrths sea-water and one- 

 fourth fresh water was used. The following results were obtained. The 

 A of this solution is about 1.35°. 



Table IV. — Slioxchig the change in the freezing point of the Mood after various 

 periods of immei'sion in three-fourths sea-water and one-fourth fresh icater 



Specimen 



Immersion time in 

 minutes 



A of blood 



1 

 2 

 3 

 4 



30 



60 



100 



230 



1.77° 

 1.74 

 1.73 

 1.64 



Both solutions cause a rise in the freezing point of the blood. Yet the 

 rise is greater in the more dilute solution. On comparing the effects of 

 the two solutions, it is seen that the same changes in the freezing point 

 are produced in a shorter time in the second solution than in the third 

 solution. A similar effect is produced in still less time in the first solu- 

 tion, fresh water, than in the second one, which is one-half fresh water 

 and one-half sea-water. 



The effect of concentrated solutions of sea-water was next measured. 

 Two such solutions were employed : one with a specific gravity of 1.035 

 and a A of 3.60° ; the other with a specific gravity of 1.040 and a A of 

 3.15°. The results were as follows : 



Table V. — Showing the change in the freezing point of the 'bJood after various 

 periods of immersion in concentrated solutions of sea-umter 



Solution A— Sp. Gr. = 1.035 A = '-^-BOO 



Specimen 



Immersion time in 

 minutes 



A of blood 



1 

 2 

 3 



30 

 50 

 75 



2.075° 

 2.115 



2.185 



Solution B - Sp. Gr. = 1.040 A = 3.15° 



Specimen 



Immersion time in 

 minutes 



A of blood 



1 



2 



3 



35 

 45 



85 



2.10 ° 



2.16 



2.175 



