(722) 
] 100 serum + O.1 er. NaCl. 
2 TOG?" t: Be OO ns 
3 100: ED ae - 
4 100 is OSE canesugar 
5 LOU, ce See ieee HA 
6 100: ces Me DN © fe 
Of these 6 solutions and for the sake of comparison also of normal 
serum, 20 cc. were added to 20 ec. of the same bloodcorpuscles. 
After being mixed, the suspensions were left to themselves for an 
hour, after which the amount of Ca in the serum was determined. 
A summary of the results is found in the foltowing table: 
Volume of / Decrease of 
Ca in serum 
Ca-oxalate | in 0, 
Unmixed serum. | 39 
1. serum +0.1 0) Na Cl 33 | 15.3%, 
pea ho) tae on SP Bb | 25.60, 
DRE OB een i 2 | 36. 9, 
4. »  » 0.884 ,, canesugar | 30 | 2e 
5 eo sd, ze 28 | 28.3 0/, 
SEN ae ee | 22 | 43.6 0/0 
Examination of this table will show plainly that indeed the addition 
of canesugar has caused a considerable transition of Ca from the 
bloodeorpuseles to the serum, and further that in accordance with 
our supposition the isosmotic NaCl solutions caused a somewhat 
slighter transition. 
The principal cause for the transition of Ca into the blood corpuscles 
by the addition of some substance to the serum must be sought in 
the fact that the blood corpuscles lose water on account of this 
addition; in other words: an increased osmotic pressure of the serum 
causes a transition of Ca to the blood corpuscles. 
If the increased osmotic pressure is caused by a salt (electrolyte) 
a movement of the calcium in the opposite direction takes place under 
the influence of the kation of the salt; but this movement is much 
less important. 
In this connection it must be pointed out that the phagocytary - 
