307. SPECIFICATIONS FOR STANDARD 

 BABCOCK GLASS WARE. 



(Adopted by the Official Dairy Instructors' Association, 1911) 



I. Milk Test Bottle. 8% 18 gram, so-called 6-inch. 

 Graduation: The total per cent graduation shall be 8. The 



graduated portion of the neck shall have a length of not less than 

 63.5 mm. (2^ inches). The graduation shall represent whole per 

 cent, five-tenths per cent and tenths per cent. The tenths per cent 

 graduations shall not be less than 3 mm. in length; the five-tenths 

 per cent graduations shall be 1 mm. longer than the tenth per cent 

 graduations, projecting 1 mm. to the left; the whole per cent 

 graduations shall extend one-half way around the neck to the right 

 and projecting 2 mm. to the left of the tenths per cent gradua- 

 tions. Each per cent graduation shall be numbered, the number 

 being placed on the left of the 'scale. The error at any point of 

 the scale shall not exceed one-tenth per cent. 



Neck: The neck shall be cylindrical for at least 9 mm. below 

 the lowest and above the highest graduation mark. The top of 

 the neck shall be flared to a diameter of not less than 10 mm. 



Bulb: The capacity of the bulb up to the junction of the neck 

 shall not be less than 45 cc. The shape of the bulb may be either 

 cylindrical or conical, with the smallest diameter at the bottom. 

 If cylindrical, the outside diameter shall be between 34 and 36 

 mm.; if conical, the outside diameter of the base shall be between 

 31 and 33 mm., and the maximum diameter between 35 and 37 mm. 



The Charge of the bottle shall be 18 rams. 



The Total Height of the bottle shall be between 150 and 165 

 mm. (5% and 6% inches). 



Each bottle shall bear a permanent identification number. 



II. Cream Test Bottles. 50% 9-gram, so-called 6-inch, and 

 50% 9-gram, so-called 9-inch. 



A. 50% 9- gram, so-called 6-inch. 



Graduation: The total per cent graduation shall be 50. The 

 graduated portion of the neck shall have a length of not less 

 than 63.5 mm. (2% inches). The graduation shall represent 5 

 per cent, 1 per cent and five-tenths per cent. The five-tenths per 

 cent graduations shall be at least 3 mm. in length; the 1 per cent 



