142 FOREST PRODUCTS 



well manufactured of standard thickness and kiln dried. All dead culls out and to 

 contain not less than 50 per cent No. i pieces or cants. 



30. Pine heading, all sizes over 12^ in. in diameter to i6| in. inclusive, shall be YG 

 in. in thickness after being dressed on one side; larger sizes shall be \ in. in thickness 

 after being dressed on one side. Specifications otherwise to be the same as provided 

 in Paragraphs 27 to 36, both inclusive, except as to thickness. 



31. No. 2 heading shall be manufactured from heading blanks culled in the process 

 of manufacturing No. i heading and shall be workable free from dead culls. 



32. All heading to be well bundled, 15 sets to the bundle, sizes 14! in. to 19! in., 

 inclusive; 2 wires to the bundle, sizes under 19! in.; 3 wires to the bundle, sizes 19! 

 and over. Number of pieces to the head not to exceed the following: 



33. No. i and M. R. grades, above 13^ in. and to 17! in., inclusive, three and four 

 pieces, at least 50 per cent to be three piece, or less. 



34. No. i and M. R. grades, 18 to 19^ in., inclusive, three-, four- and five-piece, 

 at least 50 per cent to be four-piece, or less. 



35. Heading that contains knotholes of over i in. diameter, bad slanting shakes, 

 rotten timber or other defects that make it unworkable, shall be considered as dead 

 culls. 



BIBLIOGRAPHY 



Statistical Reports U. S. Bureau of Census. 



Miscellaneous Articles in Barrel and Box. 



Miscellaneous Articles in Packages. 



Miscellaneous Articles in National Coopers' Journal. 



United States Forest Service, Washington. Production of Slack and Tight Cooperage 



in 1911. 

 WAGNER, J. B. Cooperage, 1910. 



