636 FOODS AND FOOD ADULTERANTS. 



pleasing tints as for the taste of the sweets which they contain, and 

 therefore it becomes a matter of sanitary importance to determine the 

 character of the coloring matters used. 



It is a matter of regret that other and more insistent duties have 

 prevented an earlier arrangement and study of the results, but their 

 value depends rather in the patient and painstaking labors of those en- 

 gaged iu the investigations than on their chronological appearance. 

 This part of Bulletin No. 13 is preeminently one of data rather than of 

 deductions. 



LETTERS OF TBANSMITTAL FROM THE ANALYSTS ENGAGED IN THE 



WORK. 



A general idea of the character of the examinations made and the 

 methods employed therein can be had from a perusal of the letters from 

 the several analysts transmitting the results of the analyses. 



PURDUE UNIVERSITY, 

 La Fayette, Ind., Marcli 19, 1891. 



DEAR SIR : I have to-day forwarded, to you report on honey, sirup, sugar, and can- 

 dies. I have made out the report as I understood from directions furnished. Should 

 any changes bo required of course I shall take pleasure iu making the same. 



The information regarding the origin of the samples was very difficult to obtain. 

 This is particularly true of the sugars which are usually removed from the packages 

 and sold from bins in the stores. 



In addition to the work reported 1 have tested fifteen samples of the honey, and 

 find that nine out of fifteen contain tin or some metal precipitated by H 2 S and having 

 the same general appearance as the tin precipitate found in the molasses. 



I have also examined the soda teat for molasses, but find that a mixture of molasses 

 and glucose will also give tests. 



The best informed honey man that I met stated that every genuine strained honey 

 would granulate if left open and exposed to the air for eight days. I have not yet 

 had an opportunity to test this matter. 



In regard to candies I am informed by manufacturers that there are now very few 

 boilers of candy who can make candy without the addition of a small amount of glu- 

 cose; about 10 per cent is the amount mentioned. I understand this to mean a mini- 

 mum amount. 



The itemized bill for samples will follow. 

 Very truly yours. 



H. A. HUSTON. 



Dr. H. W. WILEY, 



Chief Chemist U. S. Department of Agriculture, Washington, I). C. 



UNIVERSITY OF NEBRASKA, DEPARTMENT OF CHEMISTRY, 



Lincoln, Nebr., March 7, 1891. 



MY DEAR DOCTOR : I inclose to you to-day reports of analyses of sugars, sirups, 

 honeys, and candies, together with vouchers for purchase money. I inclose also bills for 

 expenses incurred in making purchases outside of this city. If these last can not be 

 allowed I will be out just that amount. I am very sorry for tho delay, but it lias 

 been absolutely unavoidable. 



Since January 1 we have been in the midst of a legislative session, and the ontsiile 

 drafts on uiy time have been considerable. This, with the hundred and one things 



