CHEMICAL AND PHYSICAL PAPERS. 



67 



chemicals, for the housewife to prepare for herself this superior tj^pe 

 of baking-powder at a cost of from twenty-five to thirty-five cents per 

 pound — the usual price asked for the cheaper grades. No doubt 

 many are prevented from availing themselves of this opportunity by 

 the fact that cream of tartar is pretty generally believed to be grossly 

 adulterated. To ascertain to what extent the facts bear out this belief 

 has been the aim of this investigation. The work has been carried 

 on in the laboratories of the University of Kansas School of Pharmacy 

 during the past year, and special credit is due the members of the 

 pharmacy class of 1904 for their valuable assistance in cooperating in 

 the work. 



The samples were all collected in one representative city in Kan- 

 sas — one sample from each place of business. If the following state- 

 ment of results does not represent the exact status of the quality of 

 commercial cream of tartar in Kansas, it unquestionably does in one 

 particular city. 



In column I of the subjoined tabular statement of results will be 

 found the number of samples analyzed; in column II, the source of 

 the sample; in column III, the acidity in terms of pure potassium 

 bitartrate, upon which its value as an agent for liberating carbon 

 dioxide from carbonates depends ; in column IV, the retail price per 

 pound ; in column V, the number of pounds calculated to equal, in 

 efficiency, one pound of pure cream of tartar ; the retail price of this 

 is set opposite, in column VI ; in column VII, the general observa- 

 tions. 



II. 



Drug-store 



Grocery store. .. 



III. 



Per cent. 

 99 + 

 99 + 

 99 + 

 9C + 

 99 + 

 99 + 

 99 + 

 99 + 

 99 + 

 84 

 84 



83 



83 



IV. 



$0.60 

 .50 

 1.25 

 .80 

 .75 

 .60 

 .50 

 .40 

 .35 

 .50 

 .40 



.60 



.50 



.40 

 .40 

 .75 

 .40 

 .35 

 .60 



.50 

 .40 

 .60 



V. 



1.0 

 1.0 

 1.0 

 1.0 

 1.0 

 1.0 

 1.0 

 1.0 

 1.0 

 1.2 

 1.2 



1.2 + 



1.2 + 



;i.5— 



1-5 + 



1.6 



1.6 



1.6 



1.6+ 



7.2 



7.2 



S 2 + 



VI. 



$0.60 

 .50 

 1.25 

 .80 

 .75 

 .60 

 .50 

 .40 

 .35 

 .60 

 .48 



.72 



.60 



.59 

 .61 



1.20 

 .65 

 .56 



1.00 



3.57 

 2.86 

 5 00 



VII. 



Considered as up to standard. 



Calciatn acid phosphate, etc. 

 Calcium acid phosphate, etc., with 



a trace of cream of tartar. 

 Calcium acid phosphate, etc., with 



a trace of cream of tartar. 

 Calcium acid phosphate, etc., with 



a trace of cream of tartar. 

 Calcium acid phosphate, etc. 



Calcium acid phosphate, etc., with 



a trace of cream of tartar. 

 Calcium acid phosphate, etc. 



Thirty-six samples were examined ; eight were obtained from drug- 



