1913.] PUBLIC DOCUMENT — No. 31. 121 



pipette, or other measuring' glass or utensil that has l)eeu marked by the 

 said director, or by his duly designated deputy or deputies, to indicate 

 that it is inaccurate shall be used in this commonwealth by any person 

 in determining the composition or value of milk or cream. 



Section 2. Everj^ Babcock or other centrifugal machine used in this 

 commonwealth by any inspector of milk or cream, or by any person in 

 any milk inspection laboratory for determining the composition of milk 

 or cream for purposes of inspection, or by any person in any milk dei^ot, 

 creamery, cheese factor}^, condensed milk factory or other place for 

 determining the composition or value of milk or cream as a basis for 

 payment in buying or selling, shall be subject to inspection at least once 

 in each year by the director of the Massachusetts agricultural experi- 

 ment station or by an inspector or deputy of the said directoi'. The 

 owner or user of any such centrifugal machine shall pay to the said 

 director for the use of said station as a fee for making such annual 

 inspection the actual cost of such inspection for each machine inspected. 



Any Babcock or other centrifugal machine used as aforesaid that is 

 not, in the opinion of the director, or of an inspector or deputy of the 

 said director, in condition to give accurate results, may be condemned 

 by the director or by his inspector or deputy. No Babcock or other 

 centrifugal machine that has been condemned by said director or by an 

 inspector or deputy of the director as not in condition to give accurate 

 results shall be used in this commonwealth by any person for deter- 

 mining the composition or value of milk or cream as aforesaid, unless 

 the machine be changed to the satisfaction of the said director or of his 

 inspector or deputy, and approved by him. 



Section 3. No inspector of milk or cream, and no person in any milk 

 inspection laboratory, shall manipulate the Babcock or other centrifugal 

 machine for the purpose of detennining the composition of milk or 

 cream for pur^joses of inspection, and no i^erson in any milk depot, 

 creamery, cheese factory, condensed milk factory, or other place in this 

 commonwealth shall manipulate the Babcock or other centrifugal ma- 

 chine for the purpose of deteiTnining the composition or value of milk 

 or ci'eam as a basis for payment in buying or selling, without first ob- 

 taining a certificate fi'om the director of the Massachusetts agricultural 

 experiment station, or his duly designated deputy, that he is competent 

 to perform such work. The fee for such certificate shall be two dollars, 

 and shall be paid by the applicant therefor to the said director for the 

 use of the said station. In case any holder of a certificate is notified by 

 the director, or by his duly designated deputy, to correct his use of a 

 Babcock or other centrifugal machine, the actual cost of making an in- 

 spection to ascertain if the said person has corrected his use of the said 

 machine shall be paid by the said person or by his employer to the 

 director for the use of the said station. No holder of a certificate whose 

 authority to manipulate a Babcock or other centrifugal machine has been 

 revoked by the director of the Massachusetts agricultural experiment 



