1] UPON THE RATE OF GROWTH 301 



TABLE XXVIII 

 NUTRITIVE SOLUTIONS FOR PHANEROGAMS 



SACHS' Solution GRAMMES. 



Distilled water 1,000.0 



Potassium nitrate, KN0 3 1.0 



Calcium sulphate, CaS0 4 0.5 



Magnesium sulphate, MgS0 4 0.5 



Calcium phosphate, CaHP0 4 0.5 



Ferrous sulphate, FeS0 4 trace 



SCHIMPER'S Solution ('90) 

 Distilled water 600.0 



Calcium nitrate, Ca(X0 3 ) 2 6.0 



Potassium nitrate, KX0 3 1.5 



Magnesium sulphate, MgS0 4 1.5 



Neutral potassium phosphate, K 3 P0 4 ... 1.5 



Sodium chloride, NaCl 1.5 



FRANK'S Solution 

 Water, J r distilled ; |f Berlin reservoir water . 1,000,000.0 



Calcium nitrate, Ca(N0 3 ) 2 267.4 



Potassium chloride, KC1 121.5 



Potassium phosphate, K 3 P0 4 101.9 



Magnesium sulphate, MgS0 4 7 H 2 .... 100.2 



Ferric chloride, Fe 2 Cl 6 trace 



The first differs from the others chiefly in the absence of chlo- 

 rine. 



How fit ordinary waters may be to provide all these salts is 

 shown by this analysis of the ordinary drinking water of Bos- 

 ton ( JORDAN and RICHARDS, '91) : 



TABLE XXIX 



PARTS BY WEIGHT OF INORGANIC MATTERS IN 1,000,000 PARTS OF 



POTABLE WATER 



Sulphuric acid 4.58 



Chlorine 4.00. 



Alumina and oxide of iron 0.75 



Calcium oxide 6.45 



Magnesia 1.60 



Potash 0.92 



Soda 5.00 



Silica 3.04 



Nitrates . 0.25 



