ORGANIC COMPOSITION. 



455 



Cattle/' by Col. M'Douall, of Logan, 1 show that 75 Ibs. of 

 mangold produced equal results with 107 Ibs. of Swedes; 

 while those of Mr. M'Culloch (Auchness), quoted by Dr. 

 Anderson, " have led him to the conclusion that 30 Ibs. 

 of mangold are equal in feeding value to 40 Ibs. of turnips, 

 which is exactly the average proportion deduced from the 

 foregoing analysis." 



The organic composition of the mangold leaves has been 

 determined by Dr. Anderson in the same manner as that 

 of the bulbs, by which we see that the amount of nitrogen 

 compounds they contain is considerably in excess of that 

 found in the bulbs. We must not, however, be led into 

 the error of estimating their feeding properties by this 

 test alone; as, for the reasons given at p. 332, it is pro- 

 bable that the nitrogen does not exist altogether in the 

 form of those compounds on which it is the custom to 

 base our estimate of feeding properties. 



Organic Composition of Mangold Leaves. 



A recent examination by Dr. Voelcker (May, 1859), of 

 a root of mangold, the produce of 1857, showed that 

 sound and healthy roots, if properly stored, may be pre- 

 served without any material diminution of their feeding 

 properties for the period named. 



On analysis the root gave the following composition: 



Compounds containing nitrogen (flesh-forming), 1'13 



Compounds not containing nitrogen, as sugar, gum, pectin, &c., 4'OS 



,, ,, ,, as woody fibre, 1'18 



Ash (mineral matter), T36 



' Water, 92'25 



100-00 



1 Roy. Agri. Soc. Jo w., vol. xiii. TO. 117. 



