SUGAR, MOLASSES, CONFECTIONS, AND HONEY. 639 



Tests in each case were made in triplicate. From the above results it will be seen 

 that the 220 iniu tube is a trifle long. No correction was made for this, however, in 

 the readings of the inverts. Most of invert readings were made in the 220 mm tube. 

 Third. The Fehlitig Solution. Violette's formula was used. To test it, 0.95 grams of 

 the test sugar was dissolved in 50 cc of water and inverted with 5 cc of hydrochloric 

 acid at 68 C. This solution was diluted to 100 cc. After neutralizing, 10 cc of 

 Fehliug's solution was put in a small Erlenmeyer flask, and to this 30 cc of water 

 was added and the solution boiled. The dilutt d sugar solution was gradually added 

 to the copper solution until the copper was entirely reduced as indicated by ferrocy- 

 anide of potash in the acetic acid solution. The following are the results obtained: 



4.9 cc sugar solution added to copper solution ; copper not all reduced. 



5 cc sugar solution added; copper all reduced. 



4.9 cc sugar solution added ; reaction for copper. 



50 cc sugar solution added ; no copper in solution. 



METHODS. 



The instructions sent out by you were strictly followed. 



The detailed method for detection of tin was sent in a former letter. 



The sucrose was calculated by the following formula: 



( Direct reading indirect leading ) inn 

 Per cent sucrose = < - ^ - > 1UU. 



2 

 The direct readings were all made approximately at 25 C. 



BOSTON, March 5, 1891 . 



DEAR SIR : I herewith transmit the report on the sugars, sirups, honeys, and candies 

 examined at your request. 



I have endeavored, in making my selections, to get as fair a representation of the 

 market as possible, except in the case of the candies. In these the articles most 

 likely to be adulterated were examined. As a result of the investigation, with the 

 exception of tin in some of the samples of molasses, I have failed to find any injurious 

 adulteration. 



My thanks are due to my assistant, F. W. Rennet, for the able manner in which 

 he has assisted me during this investigation. 

 Respectfully, 



S. P. SHARPIES. 

 Dr. H. W. WILEY, 



Washington, D. C. 



NEW ORLEANS, LA., March 22, 1891. 



DEAR SIR : I send you herewith analyses of 50 molasses, 50 low-grade and white 

 pulverized sugars, 50 honeys, and 25 low-grade candies. These samples were pur- 

 chased in this city according to your instructions. Great difficulty was encountered 

 in the collection of these samples, and, in many instances, either from ignorance or 

 from an indisposition to nccommodate, the wholesale or manufacturers' names could 

 not be obtained. Seven days were spent in trying to obtain samples with a known 

 history, but at last many had to be taken with only the name of the dealer. 



In the analyses performed your instructions have been followed, with two slight 

 modifications: 



First, as to clarification for polariscopic readings; and second, in giving a greater 

 superficial area to the amount required for determination of moisture in the dishes 

 used. 



