GOVERNMENT EEPOET ON BUFFALO WOOL BLANKET 

 Department of Commerce 



BUREAU OF STANDARDS 



Report on 



Blanket of Buffalo Wool 



Submitted by 



Mr. C. Goodnight, Goodnight, Texas 



Reference: Letter of March 1, 1918. In reply refer to: Test No. B76 



Heat Weight oz. 



Sample Mark Transmission Permeability per sq. yd. Thickness Ins. Rating 



B76 1.715 20.1 14.1 .163 100 



B9 1.715 6.0 20.6 .136 100 



The rating refers to a comparison of the heating qualities with 

 reference to the old U. S. Army Standard Blanket which is given 

 here as B-9. The Heat Transmission is the number of calories trans- 

 mitted per sq. cm. per hour per degree C difference in temperature. 

 The permeability may be considered as an index to the amount of 

 air passing through it and is the tangent of the curve obtained by 

 plotting velocity of air passing through against the pressure resulting 

 therefrom. To secure the most advantageous warmth qualities it is 

 desirable to have the heat transmission and permeability as close to 

 zero as possible. 



BUREAU OF STANDARDS. 

 March 23, 1918. 

 Washington, D. C. 



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