, 



Issued April 12, 1907. 



United States Department of Agriculture, 



BUREAU OF CHEMISTRY Circular No. 34. 



H. W. WILEY, Chief of Bureau. 



EXAMINATION OF PAPERS. 



INTRODUCTION. 



For the past five years the Bureau of Chemistry has examined and 

 tested papers for the various Departments of the Government service, 

 and since the establishment of the Leather and Paper Laboratory it 

 has conducted investigations looking to the improvement of papers 

 and the utilization of farm products in their manufacture. The 

 Bureau has now the equipment and experience for conducting this work 

 on a large scale. The work so far done has shown that the papers 

 supplied for Government use too frequently fall below the specifica- 

 tions, lack durability, or in some way are not adapted to the purpose 

 for which they are intended. Valuable documents and scientific work 

 are recorded on papers which will rapidly deteriorate, thus rendering 

 the records useless. In this circular the methods and tests by which 

 the composition and value of paper are judged, examples illustrative 

 of the nature and interpretation of results, and brief outlines of the 

 characteristics which the more important classes of paper should 

 possess are given. Under statutory authority the Bureau makes tests 

 for any branch of the Federal service, wherever located, and will 

 also prepare, or assist in the preparation of, specifications which are 

 accurately descriptive of papers suited to any given purpose for any 

 branch of the Federal Government. 



H. W. WILEY, Chief. 



Approved : 



JAMES WILSON, Secretary. 



WASHINGTON, D. C., March 12, 1907. 



27646 No. 3407 



