64 BOARD OF AGRICULTURE. 



After running off the last of the skim-milk, we find a most 

 offensive and greenish slime on the rear walls of the centrif- 

 ugal basket, from one-sixteenth to one-eighth of an inch 

 thick, which has the following analysis : — 



Water 67.38 



Fat 3.25 



Ash 3.S8 



Caseine 25.49 



Decomposed products, etc. 100.00 



The letter from my chemists accompanying this analysis 

 struck me as rather amusing, and I take the liberty of 

 reading it : — 



Mr. Burnett. 



Dear Sir, — I do not know in what quantities you get this refuse ; but 

 the best use of it, I should think, would be for fertilizing purposes, as it 

 is very rich in nitrogen and phosphate of lime. 



Yours, etc., A. D. Lawuik. 



From Dr. Fleischmann's paper, published in Germany, I 

 find he also speaks of this slime as follows : — 



" Although the milk treated in the various experiments was always 

 passed through four fine metal sieves before being passed into the ma- 

 chine, more or less dirty matter was invariably found on the side of the 

 drum at the completion of the process: hence it appears that tlie rapid 

 centrifusral motion cleanses the milk or cream far more elTectuallv than 

 the best-made sieve could do, and it is only natural to suppose tliat butter 

 obtained from such cream should be proportionately finer." 



Thinking, perhaps, that, by the great force by which the 

 cream is thrown off from the machine, a breaking of the 

 globules might take place, which would in theory account 

 for the rapidity of churning, I asked ra}^ friend and most 

 obliging neighbor. Dr. E. L. Sturtevant, to come up with his 

 microscope, and spend the day at my dairy. His report, 

 which also contains an examination of the refuse already 

 spoken of, I read vnih great pleasure, — 



"The centrifugal cream examined Jan. 7 has certain peculiarities as 

 examined under the microscope. 



" First, Its absolute purity; each globule standing out distinct and 

 round, and no foreign material of any nature to be detected. 



" Second, Contrary to my expectations, there were no ruptured globules. 



