10 



BULLETIN 1009, U. S. DEPARTMENT OF AGRICULTURE. 



The variations as given in Table 1 are applicable to bottles of 

 particular weights. While bottles of any capacity may be blown 

 at any specified weight, if so ordered, the general practice is to fol- 

 low the weights and capacities stated in the Wage Scale and Working 

 Rules of the Glass Bottle Blowers' Association. Weights of bottles 

 of various capacities as stated in the Wage Scale and Working Rules 

 have been compiled in Table 2. 



Table 2. — Weights of bottles of various capacities. 1 



Types of bottles. 









Capacity (fluid ounces) 











* 



1 



2 



4 



6 



8 



12 



16 



24 



32 



64 



Round and fluted prescriptions. . . 

 Round castor oils, lemon sirups, 



Oz.2 



1.25 

 1.00 



.75 

 1.00 



OZ.2 



1.50 

 1.50 



1.25 

 1.50 



1.50 

 1.25 



Oz? 

 2.0 



2.25 

 2.5 



2.0 

 2.5 



2.25 

 2.0 



Oz? 

 3.5 



4.0 



4.0 

 4.5 



4.0 

 4.0 



02.2 



5.0 

 5.0 



5.5 

 6.0 



5.5 

 5.0 



02.2 



6.5 

 6.5 



7.0 

 8.0 



6.5 

 6.5 



Oz.2 

 9.0 



9.5 



10.0 

 11.0 



10.0 

 9.0 



Oz.2 

 11.0 



11.0 



12.0 

 14.0 



13.0 

 11.5 



Oz.2 

 15 



16 



18 

 18 



19 

 15 



OZ.2 



18 

 20 



20 

 22 



22 

 18 



Oz? 



Ovals, French squares, tall blakes, 





Flats, short blakes, and oblongs... 

 Grape juices and catsups, cham- 

 pagnes, octagons, rounds, 



34 



Tinctures, round and square 



.75 



32 



Range in weight 



.75- 

 1.25 



1.25- 

 1.50 



2.0- 

 2.5 



3.5- 



4.5 



5.0- 

 6.0 



6.5- 

 8.0 



9.0- 

 11.0 



11.0- 

 14.0 



15- 



19 



18- 

 22 



32- 





34 



Corresponding range in Table 1 . .. 



4-2 



1-2 



2-4 



4-6 



4-6 



6-8 



8-12 



12-14 



14-17 



17-25 



32-40 



1 Compiled from text of Wage Scale and Working Rules of the Glass Bottle Blowers' Association, 1918-19. 



2 Avoirdupois. 



The simple types of bottles listed in Table 2 are very common 

 food containers. They are the types to which the results found in 

 this bulletin are applicable. The weights of bottles of any given 

 capacity are so uniform that they fall within one of the definite 

 ranges in weight mentioned in Table 1. Each range in weight cor- 

 responds to a capacity. For example, a corresponding range in Table 

 1 of 1 to 2 ounces, avoirdupois, corresponds to a capacity in fluid 

 ounces of 1. Therefore, there is an allowed variation in weight which 

 corresponds to each capacity, that is, the first column of Table 1 has 

 been converted from terms of weight to- terms of capacity. 



An increase in the weight of the bottle is caused by the use of 

 more glass, which thickens the walls and decreases the capacity. 

 Since the bottler is penalized for short capacity, the overweight limits 

 as given in Table 1 were selected as the basis of computing the maxi- 

 mum variations in capacity. The overweight limits have been com- 

 puted to volume equivalents by use of the factor, 1 ounce of glass is 

 equivalent to 3.1 drams in volume, the usual factor used by glass 

 blowers and manufacturers. 3 This factor has been further verified 

 by measurements and computations based on the specific gravity of 



3 Bureau of Chemistry Hearing of Glass Bottle Blowers' Association, May, 1913. 



