THE NKW YORK JOURNAL OF PHARMACY 



/Vs to cost, let mt- say it is the cheap- 

 est ampoule that can be manufactured, 

 in view of the fact that my method of 

 making the solution and filling the am- 

 poule is very simple and accurate. 



DETECTION OF AGAR AGAR IN 

 TOILET JELLYS. 



By Eugene Dutz, Ph. G. 



Agar Agar often called Chinese or 

 Japanese isinglass is a substance pre- 

 pared from marine algae. 



In commerce it occurs either in 

 transparent yellowish strips or in 

 thick pieces of a more whitish color. 

 It is odorless and tasteless and insolu- 

 ble in cold water, but yields, on being 



dissolved in hot water and cooled, a 

 gelatinizing mass. Besides its chief 

 use for making bacterial cultures, agar 

 agar is often employed in the manu- 

 facturing of toilet jelly, and as a sub- 

 stitute for gelatine in the making of 

 ice cream. 



The presence of certain character- 

 istic diatoms in agar agar induced me 

 to devise the following process for its 

 identification in toilet jellys. 



Process. 



50 grammes of the substance to be 

 examined are melted on a water bath 

 and sufificient distilled water added to 

 give it the consistency of a thin syrup. 

 Upon addition of solution of lead sub- 



