CONCERNING PATENTS ON GRAVITY OR 

 DILUTION SEPARATORS. 



In Bulletin No. 151 published in August, 1898, the eflBciency of 

 these creaming devices was summed up as follows : 



" Gravity or dilution separators are merely tin cans in which the 

 separation of cream by gravity process is claimed to be aided by 

 dilution with water. 



Under ordinary conditions the dilution is of no benefit. It may 

 be of some use when the milk is all from ' stripper ' cows, or when 

 the temperature of melting ice cannot be secured. 



These cans are not 'separators' in the universally accepted sense 

 of that term and cannot rank in efficiency with them. 



They are even less efficient than the best forms of deep setting 

 systems, such as the Cooley Creamer. 



They are no more efficient than the old fashioned shallow pan ; 

 but perhaps require rather less labor." 



These conditions have since been abundantly confirmed though 

 there seem to be many who desire to nse these cans on the score of 

 the less labor required even though there may be in most cases some 

 loss of fat. 



One of the chief misleading features used by the promoters of 

 this system is the way in which the term separator is used to imply 

 that the dilution process is equal in efficiency to a centrifugal sepa- 

 rator. This is well shown by the following quotation from a recent 

 circular of the " "Wheeler's Gravity Cream Separator. 



" Those that keep only one or two cows, as well as the large dairy- 

 man, can have the advantage of a separator at a small cost, compared 

 with the centrifugal separator or creamer." 



In another way would-be users of the dilution process are being 

 misled and this is in regard to the patents that have been issued or 

 applied for on the dilution process or on the various styles of cans 



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