BUREAU OF CHEMISTRY. 



433 



the special egg investigation conducted by the Food Research 

 Laboratory at this point. 



St. Louis laboratory. — A large number of vanilla extracts of 

 various kinds were made for information in connection with certain 

 vanilla extract cases pending in court, and a special study was made 

 of a commercial egg preservative. An investigation of the changes 

 taking place in apple juice during barrel fermentation into cider 

 vinegar has been begun and the observations will be continued on 

 this sample of vinegar. 



Seattle laboratory. — The examination of imported foods and 

 of various products for other departments of the Government has con- 

 stituted the bulk of the work of the Seattle laboratory. Special 

 work and investigations included: (1) The study of the distinction 

 between crude and refined sulphur for the local customs officials; 

 (2) a study of so-called near-beers sold in prohibition sections; (3) 

 the preparation of Circular 63, Bureau of Chemistry, on food colors; 

 (4) cooperative work on preservatives and headache mixtures; (5) a 

 report of the opinions of local dealers, etc., regarding certain spices; 

 (6) a report to the quartermaster's office, United States Army, 

 Seattle, on the water in the submarine cable tank at Tacoma, Wash. 



St. Paul laboratory. — A study was made of wheat flour of known 

 origin and definite history for the purpose of securing information 

 leading to the fixing of more definite limits of composition for wheat 

 flour of the various grades. For this purpose, some 66 samples were 

 secured and analyzed, involving about 660 determinations. The 

 flour thus examined was obtained principally from the Southwestern 

 States and manufactured from winter wheat. A large importation 

 of green olives, apparently purchased as second quality, was con- 

 demned during the year, wormy olives and those stung by insects 

 constituting the bulk of the shipment. 



examination of dairy products under the law. 



The work of the dairy laboratory, as in previous years, has covered 

 the entire range of dairy products, including other articles closely 

 related thereto, such as malted milks, lactated infant foods, butter 

 colors, ice-cream thickeners or fillers, and other articles of minor 

 importance. The total number of samples examined was 513, of 

 which 320 were official interstate and import samples, the remaining 

 193 being of miscellaneous origin, and consisting chiefly of evaporated 

 milks examined in the course of an investigation of the manufacture 

 of this product. A classified list of the samples examined is as 

 follows : 



Evaporated milks 201 



Cheese 91 



Cream 39 



Butter 32 



Malted milkn and lactated foods 29 



Condensed milks 28 



Fresh milks 25 



Dry milks 20 



Condensed skimmed milks 13 



Ice creams 13 



Oleomargarins 8 



Ice-cream thickeners 5 



Miscellaneous butter colors, butter 



flavors, fermented milks, etc 9 



Total. 



513 



The greater part of the work under the food law during the year 

 was upon evaporated, condensed, and dried milks, malted milks, 

 lactated infant foods, cheese, and butter. 



23165°— AGE 1911- 



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