Page 4 has a paragraph that says: Several “quart” (26 oz.) blob-top beer bottles are embossed “Pat/F.C.G.Co. / 85” on the base, apparently in reference to the 1885 patent for the Baltimore Loop closure patented by William Painter. Nadorff & Bro; Schaefer-Meyer; H. F. Krieger; Fred J. Drexler; and A.& D. Schmitt were Louisville bottlers or brewers who had bottles supplied to them by Falls City.
According to the book "Louisville Breweries - A History of the Brewing Industry in Louisville, Kentucky, New Albany and Jeffersonville, Indiana" (1995) by Peter R. Geutig and Conrad B. Selle, on page 275, they write that Fred Drexler, Jr was in business (under that particular name) from 1888 to 1892.
There were several incarnations of the Drexler name in Louisville, and at least 4 embossing variations on those types of blobtop "export beer style" beer bottles. Such as "Drexler, Ihmohr and Company" from 1883-1888, and "Drexler-Krieger Bottling Company" which was the name from 1892-1894.
That book contains a lot of good information, and tons of pics of old beer and ale bottles. Geutig and Selle were bottle diggers back in the 1970s-1980s if I understand this right. That book is very hard to find, but if you run across a copy, grab it!
"F C G CO" (Falls City Glass Company) was in business from around 1884-1892.