Submarines were first in common use in the early 1900s, and were generally known about by the First World War. Which is why the May 19 1915 edition of the Toronto Daily Star could feature this ad:
We’ve run into Abbey’s Effervescent Salt before – there was a somewhat cryptic ad for it here. This ad features a testimonial from the Medical Officer of Health for London, England! (Not to be confused with the Medical Officer of Health for London, Ontario.) He wouldn’t lie to you, would he?
What’s interesting is that Abbey’s is available in two sizes: the 25-cent bottle if you plan on being only a little stopped up, or the 60-cent version if you are in regular need.