"I must tell you all about it first. I called to explain it to you. You see I've been investigating the causes of epidemic diseases. Some scientists think they are spread by molecules in the air; others attribute them to gases generated in the sewers; others hold that they are conveyed by contagion; but I—"
"Aid you goig to tague thad idferdal thig away frob here?" asked the major.
"But I have discovered that these diseases are spread by the agency of door-mats. Do you understand? Door-mats! And I'll explain to you how it's done. Here's a man who's been in a house where there's disease. He gets it on his boots. The leather is porous, and it becomes saturated. He goes to another house and wipes his boots on the mat. Now, every man who uses that mat must get some of the stuff on his boots, and he spreads it over every other door-mat that he wipes them on. Now, don't he?"
"Why dode you tague thad sbell frob udder by dose?"
"Well, then, my idea is to construct a door-mat that will disinfect those boots. I do it by saturating the mat with carbolic acid and drying it gradually. I have one here prepared by my process. Shall I unroll it?"
"If you do, I'll blow your braids out!" shouted the major.
"Oh, very well, then. Now, the objection to this beautiful invention is that it possesses a very strong and positive odor."
"I'll bed it does," said the major.
[Illustration: THE CARBOLIC DOOR-MAT]
"And as this is offensive to many persons, I give to each purchaser a 'nose-guard,' which is to be worn upon the nose while in a house where the carbolic mat is placed. This nose-guard is filled with a substance which completely neutralizes the smell, and it has only one disadvantage. Now, what is that?"