1858.] SENATE— No. 4. 161 



Un worth, and for which a patent has been applied for. The 

 object aimed at in this metiiod will appear in the following 

 letter from Prof. Ilorsford to the inventor. 



" Cambridge, Jan. 4, 1858. 



Dear Sir : — I have examined with great interest the method 

 of treating milk which yon have devised, with a view to pro- 

 duce from a given supply of milk, the largest practicable 

 measure of excellent butter. 



The use of block tin pails, pans, and chnrns, commends 

 itself as well for the f icility with which the vessels may be 

 cleaned, as on account of the impossibility of their imbibing 

 and retaining traces of milk, [to become acid, and in its turn 

 rapidly cliange other sweet milk to sour,] and the insuscepti- 

 bility of the metal to corrosion from the joint action of the air 

 and milk. 



The permanently elevated temperature to which the milk is 

 subjected, and the shallow layer of milk in the pans which is 

 prescribed, will obviously facilitate the separation of the butter 

 particles [tlie cream] from the other ingredients of the milk. 



The idea of lessening the chances of good butter becoming 

 rancid, by effectually separating the butter particles from the 

 caseinc at tlie outset, — and the necessity for providing for the 

 absolute cleanliness and freedom from all traces of milk previ- 

 ously in the vessels, on the theory of their being ferment in the 

 sour milk which will greatly hasten the changes in sweet milk, 

 are, it is needless to say, sound in a chemical point of view. 



If attention to the particulars, which you have made promi- 

 nent might become general, it can not be doubted that great 

 advantages would result to both producer and consumer. 

 I am very respectfully and truly yours, 



E. N. HORSFORD." 



In making a statement of his method Baron Unwcrth speaks 

 as follows : — 



" The breeding of cattle is one of the most interesting ana 

 profitable branches of farming. The production of beef and 

 tallow, and especially the production of milk and the making 

 of butter and cheese, furnish food indispensable to man. This 

 branch of agriculture is so extensive that the least mistake, or 



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