VOLUME VARIATION OF BOTTLED FOODS. 9 



practice in bottling foods is the attainment of conditions in the bot- 

 tler's state of business in which he (a) includes in his orders for bot- 

 tles the specifications as to capacity when filled to a specified height, 

 (b) tests a representative sample of every lot of bottles received, and 

 rejects those lots appreciably under capacity, (c) fills his bottles to a 

 height determined from the results of his tests, and (d) has his labels 

 printed with a definite, correct statement as to the quantity of con- 

 tents and applies them unaltered to the bottles he fills, such statement 

 to be correct within his required variations. 



The calculated maximum variations computed in this bulletin are 

 based on the assumption that this specified good commercial practice 

 in bottling has been attained. 



CALCULATED MAXIMUM VARIATION IN THE VOLUME OF 

 BOTTLED FOODS. 



The first and most important requisite in the carrying out of the 

 good commercial practice plan in bottling is that the variation in the 

 bottles shall be as small as commercially practicable. With the use 

 of accurate bottles the bottler is able to adjust his filling process to 

 any extent he desires and to produce bottles of food which, in quan- 

 tity of contents, vary within limits as narrow as he may wish to have 

 them. 



The calculated maximum variation in the volume of bottled foods 

 is computed in this bulletin on the basis of the usual variations in the 

 bottles. It is defined as the volume which is equivalent to the allowed 

 weight variation of the bottle as manufactured. 



Variations in the weight of bottles which the manufacturer shall 

 allow to the blower, as published in the Wage Scale and Working 

 Rules of the Glass Bottle Blowers' Association, are given in Table 1. 



Table 1. — Variations in weight of bottles allowed by manufacturers. 



Weight of bottles. 



Under. Over. 



Ounces. 



Ounces. 



i 



i 



8 



1 



1 



8 

 1 

 2 

 1 

 3 



14 



2" 

 3 



Ounces. 



i 

 i 



2 

 § 



1 



1 



li 



u 



14. 



2 

 3 

 4 

 5 



i J to 1 



1 to 2 



2 to 4 



4 to 6 



6to8 



8 to 10 



10 to 12 



12 to 14 



14 to 17 



17 to 20 



20 to 25 



25 to 28 



28 to 32 



32 to 40 



40 to 50 



50 to 60 



4 





1 Inclusive. The following figures are not inclusive. 

 68708°— 21 2 



