This is the Acid 



That Destroys Your Teeth 



All Statements Approved by High Dental Authorities 



Hidden in the Film 



T 



HE acid which destroys your teeth is lac- 

 tic acid, produced from certain foods by 

 action of bacteria. 



The film on your teeth — that slimy film — 

 holds the food substance while it ferments and 

 forms acid. Then it holds the acid in contact 

 with the teeth to cause decay. 



This film clings to the teeth, gets between the 

 teeth, enters crevices and stays. The ordinary 

 dentifrice does not dissolve it. The tooth brush 

 fails to remove it all. So it protects the acid. 

 Free acids are neutralized by alkaline saliva. 



That film is the source of nearly all tooth 

 troubles. That is what discolors, not your teeth. 

 It is the basis of tartar. It is a breeder of germs 

 — millions of them. Those germs, with tartar, 

 are the chief causes of pyorrhea. 



Brushing teeth does not suffice, as nearly ev- 

 erybody knows. You must remove the film. 

 After painstaking research, dental science has 

 found a way to do that. The way is now em- 

 bodied in a dentifrice called Pepsodent. And 

 we offer you a 10-Day Tube to show you what 

 it does. 



Use It 10 Days — Free 



Pepsodent is based on pepsin, the digestant 

 of albumin. The film is albuminous matter. 

 The object of Pepsodent is to dissolve it, then 

 to constantly combat it. 



Ordinary pepsin will not do. It must be acti- 

 vated, and the usual agent is harmful to the 

 teeth. So pepsin long seemed impossible. 



Now science has invented a harmless acti- 

 vating method. Five governments have already 

 granted patents. Now active pepsin can be 

 applied twice daily to the teeth. 



Authorities have made many clinical tests. 

 Thousands of dentists have tried it. And now 

 leading dentists all over America urge its uni- 

 versal adoption. 



T^^ m—^^mm^mm—m—m pat. off. | 



REG. U.S. hnHHHnmHBHiM 

 The New-Day Dentifrice 



A Scientific Product — Sold by Druggists Everywhere 



(229) 



Send the Coupon for a 10-Day Tube 



Note how clean the teeth feel after using. Mark 

 the absence of the slimy film. See how the teeth 

 whiten as the fixed film disappears. 



Compare the results with the methods you now 

 use. Judge for yourself which best protects the 

 teeth. Do this for your sake and your children's 

 sake. Cut out the coupon now. 



Ten-Day Tube Free 



THE PEPSODENT CO., 



Dept. 631, 1 104 S. Wabash Ave., Chicago. 111. 

 Mail 10-Day Tube of Pepsodent to 



Addi 



'Mention The Geographic — It identifies you' 



