214 



FOODS AND DIETARIES 



Method and Observations. — Fill a test tube with raw white of 

 egg. Pour slowly a little alcohol into the tube. What effect does 

 it have on the white of egg ? Pour in equal amounts of alcohol and 

 of egg, and mix the two substances by shaking. What is the 

 effect? 



Note. — The alcohol takes out the water from the white of egg. 



Conclusion. — What does alcohol do to white of egg ? Might 

 it have the same effect upon living matter? 



Froblem, 181 : To determine the amount of alcohol in some 

 patent medicines. 



Materials. — Materials shown in cut in Civic Biology, page 294. 



Observations. — Note the percentage of alcohol (represented by 



the solid black) in the 

 test tubes. A test 

 tube represents a glass. 

 Compare the amount 

 of alcohol in bitters 

 (fc) as compared with a 

 like amount of beer. 

 Compare the amount 

 of alcohol in tonic (j) as 

 compared with a Hke 

 amount of champagne. 



Many Indians, when the sale of liquor was stopped on their 

 reservation, began using certain patent remedies. How many 

 glasses of bitters (fc) would they have to take to get the amount of 

 alcohol found in a glass of whisky? 



Conclusion. — ^1. Why are some patent medicines dangerous? 



2. Why might they have a tonic effect? 



Problem 182 : To test for acetanilid and to hnow some -patent 

 medicines containing it. 



Materials. — Headache powder, zinc chloride, test tube. 



Method. — Mix a half spoonful of zinc chloride with an equal 

 amount of some headache powder in a dry test tube. Heat 

 slowly. 



