554 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



The water had a deep yellow colour and was of a distinctly hare 

 nature. The results show that it contained exceedingly large quantitiei 

 of dissolved organic matter and ammonia, while, in addition, chloride: 

 and nitrates were exceptionally high. 



This was a water of surface supply, and had evidently been grosslj 

 polluted. In addition, it contained some amount of zinc in solutionji 

 the water having, no doubt, acted upon galvanized iron pipes. I 



In this connexion it is w^orth while to note that it frequentltji 

 happens that waters which contain any marked quantity of chloride;'' 

 are found to act upon metal pipes like the above, and that it is no! 

 necessary that they should be soft waters for this action to take place 

 though such action more generally takes place, it is true, with sof 

 waters than with hard ones. 



3. Manubes. 

 (a) Bone Meal. I 



A sample of bone meal was sent to me, not for the purpose oj 

 determining its quality, but because a number of sparrows had bee| 

 found dead in a field where the bone meal had been spread, and it wa 

 thought likely that poison had been mixed with the bone meal. Thi 

 however, was not found to be the case. 



(b) Fish Manure. 



The analysis of this — a sample of quite 

 follows : — 



Moisture 



* Organic matter .... 

 t Phosphoric acid .... 



Lime . . . 



Magnesia, alkalies, etc. . 



Sand 



* Containing nitrogen .... 



Equal to ammonia . . . . 

 t Equal to tribasic phosphate of lime 



^ood quality — was 



Per ceut. 

 10-72 

 . 51-13 

 . 8-60 

 10-87 

 . 13-74 

 4-94 



100-00 



. 5-76 

 . 6-99 

 . 18-79 



(c) Rape Dust. 



A member of the Society, residing in Kent, sent me a sample 

 tliis, being somewhat suspicious of it, as it appeared to him to conta 

 a considerable amount of dirt. This was confirmed by my analysi 

 wliich gnve the following results: — 



Percent. 

 . 3-85 

 . 4-65 

 . 28-80 

 . 19-15 



Nitrogen 



Equal to ammonia 

 Mineral matter 

 Including sand 



0\\yo must be exercised in the purchase of i 



ipe dust or rnjio cake 



