298 On Mangold-Wurxel and Swedish Turnips for Cattle. 



upon mangold-wurzel he again began to increase in girth, because 

 it is very well known that, if an animal is changed from more to 

 less nutritious food, the probable consequence will be that his 

 growth will be stopped. The result appeared to me so decisive, 

 that I have not tried the experiment with the same accuracy since ; 

 but I did try the following year the feeding a cow alternately on 

 Swedish turnips and mangold-wurzel, and though I have not by 

 me the details of the trial, I remember that the result confirmed 

 the experiment of the previous year. 



Believe me, my dear Sir, 



Yours most truly. 



Spencer. 



Philip Pusey, Esq. 



XXVII. — On the Cultivation of Mangold- Wurzel. By William 



Miles, M.P. 



To Ph. Pusey, E^q., M.P. 



Dear Pusey, — Notwithstanding the favourable result of Lord 

 Spencer's experiment with mangold-wurzel, the consideration will 

 naturally suggest itself to the mind of the farmer previously to his 

 adopting the cultivation of this root, whether, although the mangold- 

 wurzel may bring on his cattle faster and better than the swede 

 turnip, it is not more difficult of culture, more tender in its habits, 

 and less productive in bulk per acre than the Swedish turnip ; and 

 I think, therefore, it may not be unprofitable to lay before the 

 readers of the Journal first, the chemical analysis of the highest 

 and lowest order of turnip and of mangold-wurzel as given by 

 Sir H. Davy, and of the sugar-beet and orange globe mangold- 

 wurzel as lately obtained on the same plan by the celebrated 

 Bristol chemist, Mr. Herapath ; and then to point out the system 

 adopted by myself in the West of England in the cultivation of 

 mangold-wurzel, which has been attended with complete success. 



Roots. 



Quantity of Nutritive Matter in 1000 parts. 



Species. 



Mucilage or 

 Starch. 



Saccharine 

 Matter or 

 Sagar. 



Gluten or 

 Albumen. 



Extract, 



Total Soluble 

 or Nutritive 

 Matter. 



Swedish turnip . 

 White turnip 

 Mangold-wurzel 

 Orange-globe , 

 Sugar-beet . . . 



9 

 7 



13 



25| 

 17| 



51 



34 

 119 

 106f 

 1261 



2 

 1 



4 



H 



2 



less than 1 

 1 



G4 



42 

 136 

 135i 

 146f 



