METHOD OF DETERMINING IRON IN WATERS. 353 



Iron found. Iron calculated, 



milligr. milligr. 



510*00 517*00 



400' 00 With Salts (A). 3 93 '4° 



39°'°° 389'7° 



184*99 178*10 



90*00 9°" 8 3 



66*40 67*80 



29*40 With Salts (C). 28*70 



27*00 3 2 'o7 



2 579 2 5' 8 5 



»7'99 *9'4 8 



11*25 . 12*92 



11*70 With Salts (B). io*86 



IO"IO IO*2I 



8*30 8*29 



6'6o 6*oo 



4*20 4*14 



3'3° 3*o6 



i*8o i*86 



'9° '99 



•70 *68 



•64 "62 



62 '62 



•61 With Salts (C). -57 



'5* "54 



•51 '5 2 



$2 '5i 



'55 '53 



54 '55 



•48 With Salts (B). 43 



'45 '45 



'4o '4 1 



•40 With KJS T 3 (D). * 4 o 



'4° *39 



'3 8 "39 



'34 '34 



'33 '3° 



•32 '3 1 



•28 31 



•29 With Salts (0). '29 



•23 '26 



•21 23 



•23 With Salts (B). -22 



22 "25 



*2I '21 



•21 



