256 FOODS AND DIETARIES 



them more of an object lesson. Let each one represent a glass 

 of the compound considered. 



2. How much alcohol in tonic j (Fig. 59), as compared with 

 a bottle of beer of the same size ? 



3. How many bottles of champagne or claret will equal the 

 alcohol value of one bottle of tonic j (Fig. 59) ? 



4. How much beer would a toper need in order to equal in 

 alcohol value one bottle of bitters I (Fig. 59) ? 



5. Get the names of as many patent medicines as you can 

 at drug stores, such as " spring tonics," " invigorators," " swamp 

 roots," " nerve builders," " bitters," etc. 



Conclusion. Can you decide why most of the above 

 might have a decided " tonic " effect for a short time ? 

 Note. Most patent medicines cure by faith and the stimu- 

 lus of the contained alcohol or opiates. Explain how the 

 effect of these medicines might cause most people to write 

 glowing testimonials. 



b. Ozone Preparations (Optional) 



Note. These and similar preparations are being put on the market in 

 answer to a demand for something to kill disease germs. The public 

 mind blames germs for all diseases. 



Observations. 1. Get the names of as many patent medicines as claim 

 to cure all such germ diseases as asthma, bronchitis, hay fever, tubercu- 

 losis, fevers, etc. 



2. Look up ozone and its properties. (See any good text in chem- 

 istry, or a dictionary.) 



3. What do these medicines profess to cure ? Note. Notice that the 

 list includes (1) all diseases that begin with fever ; (2) all catarrh ; (3) 

 all contagious diseases ; (4) all inflammation ; (5) all the results of im- 

 pure and poisoned blood. 



4. What is the taste of the so-called ozone compounds ? Note. The 

 taste indicates the presence of an acid. 



5. Warm some of one of these compounds with HC1. Is there an odor 

 something like that from burning sulphur matches ? Are there bubbles 

 given off ? Wet a piece of filter paper with a potassium bichromate solu- 

 tion and expose to the escaping fumes. Does it turn the paper green ? 

 Note. A green color shows the presence of sulphurous acid. 



