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ORGANIC IRON COMPOUNDS IN PLANTS. 



4) . The iron compound which I obtained is evidently 

 different from the so called " haematogen," since the former is 

 partly soluble by artificial pepsin digestion, and both the residue 

 and the dissolved portion (precipitable with absolute alcohol) 

 contain iron in organic combination and liberate a small quantity 

 of the iron by the action of 0.2% hydrochloric acid while the so 

 called " haematogen " docs not undergo any change by artificial 

 digestion or by the action of 0.2% hydrochloric acid for a 

 short time at the ordinary temperature. The substance obtained 

 by me is also much more difficultly soluble in dilute ammonia. 



5) . A similar iron compound exists in many other plants 

 according to my examination, and its distribution seems to be 

 very wide. 



