Mangold-Pulp (the Refuse of Beet-root Distilleries). 1 



3. Mangolds contain much less crude fibre than the pulp, 

 with an equal proportion of water. 



The average amount of crude fibre in the two mangolds dried 

 at 212 Fahr. is 18'92 ; the mean of fibre determinations in the 

 two specimens of pulp, 49 '09. We have thus a difference of 30 

 per cent, of crude fibre in favour of the pulp. Minor differences 

 which will be observed in the composition of the pulp and the 

 root itself may be left unnoticed, for they are less striking in 

 themselves and immaterial in a consideration of the comparative 

 feeding value of the two substances. 



A careful consideration of the differences just pointed out in 

 the composition of pulp and roots will enable us to decide with 

 no great difficulty : 



1. That, weight for weight, pulp similar to that analysed by 

 me cannot possibly have the same feeding value as good mangold- 

 wurzels. 



2. That such pulp, however, is a refuse material which pos- 

 sesses high feeding properties. 



To prove that the pulp examined by me is not equal in nutri- 

 tive value to the good mangolds, I need only state that the latter 

 were found to contain nearly 3J per cent, more dry matter than 

 the pulp. In materials containing so much water as exists in 

 mangolds or pulp, this difference alone is sufficient to settle the 

 question, whether a ton of pulp is as nutritious as a ton of man- 

 golds. The average percentage of dry matter in the two man- 

 golds examined by me is 12'05. A ton of mangolds therefore 

 contains 270 Ibs. of dry substance in round numbers. On the 

 other hand, the mean of the water determinations in the two 

 specimens of pulp is 91 '31, which leaves 8'69 of solid matter in 

 100 parts of pulp. A ton of pulp accordingly contains 194J Ibs. 

 of solid matter. In 1 ton of mangolds there were thus 76J Ibs. 

 more of solid feeding-matter, or more than one-third more feeding- 

 matter, than in 1 ton of pulp. Unless therefore the dry matters 

 which compose the pulp are greatly superior in feeding pro- 

 perties, mangolds must have a decided advantage over the pulp 

 which I analysed. 



It is not difficult to prove that this is not the case. I have 

 just pointed out that mangolds contain 2J times as much 

 sugar, gum, and soluble pectinous compounds. In the per- 

 fectly dry root we have 38 per cent, more of these substances 

 than in the pulp. The latter indeed hardly contains any sugar ; 

 and I question much whether the soluble non-nitrogenised sub- 

 stances in the pulp have the same practical feeding value as 

 the sugar and other soluble non-nitrogenised substances in the 

 root itself. However, leaving the question as to the comparative 

 value of the soluble non-nitrogenised matters of the pulp and of 



