( 1175 ) 
MI ae 1 > » NaCl + Na,Cu (SO,,, . 2 H,O 
i. WM 4 yy, | NaCl -+ Nas 10 HO 
SU oF d 3 »- Na,SO,). 10 HO + Na,Ca (SO) 250 
um 7%, N es CuSO, .5 HO + Na,Cu (SO) HO 
“i = 5 wa, CuSO, .5H,0:--- Na,s0, - 10,0; 
We also find four saturation points: 
n saturated with CuSO, .5H,O + CuCl, . 2H,O + Na,Cu (SO), . 2H,0 
mm ä „ CuCl,. 2H,0O + NaCl + Na,Cu (SO), . 2H,0 
s : ',, NaCl + Na,SO, .10H,O + Na,Cu (SO,), . 2H,O 
u pe „ CuSO,.5H,0 + Na,SO,.10H,O + Na,Cu (SO), 2H,0. 
Ma, SO, 
Fig 3. 
As will be readily seen from fig. 3, at 15°, in presence of solution 
there can exist: 
CuCl, .2H,O by the side of CuSO,.5H,O, NaCl or 
Na,Cu (SO,), . 2H,O but not to Na,SO, „10 H,O; 
CuSO,.5H,O by the side of CuCl,.2 H,O, Na,SO,.10H,O or 
Na,Cu(SO,),.2H,O but not to NaCl; 
NaCl by the side of CuCl, .2 H,0, Na,SO, .10H,O or 
Na, (SO,), . 2 H,O but not to CuSO,.5H,0; 
Na,SQ0,.10H,O by the side of Cu 50,.5 H,O, NaCl or 
Na, Cu (SO,), .2 H,O but not to CuCl, .2 H,0; 
Na,Cu (SO,), .2 H,O by the side of all other solid substances. 
In table III are given the compositions of the solutions. 
