( 1166 ) 
CuSO, . 5H,0. by, -Cu, , sCuCl, „250: ‘by: Ca, Na sOy by Zi and 
the double salt Na,Cu(SO,), .2H,O by D. 
The intersecting lines of the saturation surfaces are the saturation 
lines; these represent the solutions which are saturated with two 
solid substances simultaneously. The following ones are found: 
en the saturation line of CuSO, .5H,O + CuCl, . 2H,O 
nm ,, “ >» CuCl, .2H,O + Na,Cu(SO,), . 2H,O 
TG 3 , sas Cul .2H.0 Je NaCl 
Ot re >» NaCl + Na,Cu(SO,), . 2H,O 
Uh eae iz >» NaCl + Na,SO, 
(i ee ms > » Na,sO, + Na,Cu(SO,), . 2H,O 
ee ” » >» CuSO,.5H,O + Na,Cu(SO,), . 2H,0 
In addition we have three saturation points, namely, points which 
represent a solution saturated with three solid substances. They are 
the following: 
n saturated with CuSO, .5H,O + CuCl, .2H,O + Na,Cu(SO,), .2H,O 
m 5 » NaCl + CuCl, .2H,O + Na,Cu(SO,), . 2H,O 
/ 5 » Na,SO, + NaCl + Na,Cu(SO,), . 2H,O 
As may be readily noticed from fig. 1 in presence of solution 
there can exist 
CuSO, .5H,O by the side of CuCl, .2H,O or Na,Cu(SO,), . 2H,O 
but not to NaCl of Na,SO,. 
CuCl, .2H,O by the side of CuSO, .5H,0, NaCl or Na,Cu(SO,),.2H,0 
but not to Na,SO, 
NaCl by the side of CuCl, .2H,O, Na,SO, or Na,Cu(SO,), . 2H,O 
but not to CuSO, .5H,O 
Na,SO, by the side of NaCl or Na,Cu(SO,), . 2H,O 
but not ‘to CuSO, .5H,O of CuCl, . 2H,0 
Na,Cu(SO,), .2H,O can exist by the side of each of the other salts. 
In table I are indicated the compositions of different solutions in 
Mol. °/,; the double salt Na,Cu(SO,), 2H,O is represented by D. 
TABLE TL 
Compositions in Mol. °/) at 35°. 
Point. H,O0 CuSO, CuCl, Na,SO, NaCl, Solid phase. 
f. 90.314 0 9.689 0 0 CuCl,.2H,O 
e. 90108 0.592 9.300 0 0 CuSO,.5H,O0-+-CuCl,.2H,O 
g. _ 88.387 0 8.708 0 9.905 NaCl+CuCl,.2H,O 
ie 90.311 0 9.689 0 0 CuCl,.2H,O 
