11 



11 VER 



Among the more important lines of contracts work may be men- 



| tioned the investigation and examination of post-mark and canceling 



I inks, inking pads, glue, glycerin, soap, lubricating oils, and linoleum 



Bused by the Post-Office Department; of disinfectants, lubricating oils, 



and coals used by the Government Hospital for the Insane; of dry 



colors, oils, glue, soap, steel, and miscellaneous supplies used by the 

 . Bureau of Engraving and Printing; of gums, oils, and alloys used by 



the Government Printing Office; of writing inks, typewriter ribbons, 



carbon papers, etc., used in the various Executive Departments where 



permanence of records is essential; of paints, oils, varnishes, chem- 

 lical glassware and other apparatus used in the Department of Agri- 

 I culture, and of supplies for the Commissary Office of the War Depart- 

 Bment and for the Isthmian Canal Commission, including paints, pig- 

 ments, oils, metals, and miscellaneous supplies; of writing inks, type- 

 writer ribbons, glue, soaps, oils, varnishes, paints, and miscellaneous 



I supplies for the General Supply Committee, and of lubricating oils, 



paints, oils, colors, varnishes, and miscellaneous supplies for the 

 || Commissioners of the District of Columbia. 



This laboratory, at the request of the Secretary of the Treasury, 

 also examines a large number and variety of materials regarding 

 which some question has arisen as to classification for dutiable 

 purposes. 



DAIRY LABORATORY. 



G. E. PATRICK, Chief. 



The Dairy Laboratory examines dairy products of every descrip- 

 tion and studies methods for making such examinations. A large 

 I part of the work at present is in connection with the enforcement of 

 jthe food and drugs act of 1906, in the examination of interstate 

 samples of milk, condensed milk, ice cream, butter, and cheese, to 

 (determine questions as to their adulteration and mislabeling. Also 

 [hinder the section of the same act referring to imported foods, this 

 laboratory examines many samples of imported dairy products, 

 imostly cheese, taken by the customs officers at the various ports of 

 ientry. Marked beneficial results are already shown in the improved 

 quality of the cheeses imported from certain countries. 



Chemical examinations are made of the samples of butter taken 



;by the Bureau of Animal Industry in its enforcement of the law of 



1902, regulating the manufacture and sale of renovated butter. All 



kinds of dairy products are also examined for the same Bureau in its 



' general survey of American markets. Samples of dairy products 



1 'received from other sources are analyzed when such work promises 



to be of public benefit. 



New methods proposed for the analysis of dairy products receive 

 Critical study in this laboratory, both independently and in collabora- 

 tion with the Association of Official Agricultural Chemists. 



[Cir. 14] 



