The manufacturer of fax produced several undated documents for dealers, explaining that newspapers in the following American cities would advertise the tampon, with other cities added "as distribution develops":

Akron, Albany, Atlanta, Baltimore, Binghamton, Birmingham, Boston, Bridgeport, Brooklyn, Buffalo, Charleston, Charlotte, Chattanooga, Chicago, Cincinnati, Cleveland, Columbus, Dallas, Dayton, Denver, Des Moines, Detroit, Duluth, El Paso, Erie, Evansville, Fort Wayne, Fort Worth, Grand Rapids, Harrisburg, Houston, Indianapolis, Jacksonville, Kansas City (Mo.), Knoxville, Little Rock, Lincoln, Los Angeles, Louisville, Memphis, Miami, Milwaukee, Minneapolis, Nashville, Newark, New Orleans, New York, Norfolk, Oakland, Oklahoma City, Omaha, Peoria, Philadelphia, Pittsburgh, Portland (Ore.), Providence, Richmond, Rochester, Sacramento, St, Louis, St. Paul, Salt Lake City, San Antonio, San Francisco, Seattle, Sioux City, South Bend, Spokane, Springfield (Mass.), Syracuse, Tacoma, Trenton, Utica, Washington, Wichita and Wilkesbarra

I suggest looking in newspaper archives in these cities, starting around 1935 and moving toward the 1920s. I give reasons elsewhere for believing that fax is a very early tampon, maybe the earliest. Prove me right or wrong!

Here's some text from the document containing the cities shown above:

a new freedom for women [This title is written in huge, all lower-case type. The word fax is always lower-case and italic.]

A constantly changing world brings a never-ending stream of new ideas, better methods, more comforts, greater freedom. It has long since eliminated the flouncing petticoats, the bulging bustle and other uncomfortable garments.

Now comes the greatest freedom of all, the elimination of the cumbersome, chafing, binding sanitary napkin to be replaced by fax, the invisible sanitary napkin [it doesn't say "tampon," perhaps an unfamiliar word to the public]. No pins, no pads, no belts. Nothing to wear that that can show even in a close-fitting bathing suit.

Absolutely safe. Complete protection every day. So comfortable that the wearer is unaware of its presence. Nothing to injure or even irritate delicate tissues.

Soothingly smooth before use and a soft, fluffy highly absorbent invisible pad in use.

fax is a scientific combination of old ideas [this line is in large, bold type] [end of document text]

Compare this language to a newspaper ad for Tampax from 1937 (Tampax started in 1936): "Tampax is a new method of sanitary protection which eliminates the external pad entirely . . . Tampax is worn internally. . . . Tampax eliminates belts, pins, pads and the chafing, binding discomfort and embarrassment that go with them . . . . [The word "tampon" is never mentioned here either, as it is not in the Wix ad from 1934. The Wix language is also similar to the language of these two other products.]