Tarzan at the Earth's Core was first published by Metropolitan Books on Nov. 28, 1930.
Grosset & Dunlap, a book seller that at the time specialized in the rebinding and marketing of unsold popular literature from other publishers, released a version of Tarzan at the Earth's Core in 1932. These books have "Metropolitan" on the title page and "Grosset & Dunlap" on the spine. The picture to the left is of the dust jacket.
Metropolitan Newspaper Feature Service, Inc., a subdivision of Metropolitan Books, publishers of the hardcover book version, published the story in condensed newspaper comic-strip form. Rex Maxon drew the illustrations. The series appeared in the newspapers six days a week, from Monday to Saturday. The series doesn't seem to have run synchronically in all newspapers that carried it. In the Worcester Evening Post, Tarzan at the Earth's Core appeared during the period from about December 1931 to March 1932.
These comic strips were collected by Roland N. Anderson (1916-1982) while working as a paperboy, delivering the Worcester Evening Post and the Worcester Evening Gazette, both newspapers published in Worcester, Massachusetts.
When Ballantine Books republished this book in 1964, it summarized it on the back cover as follows: "David Innes was a captive in Pellucidar, the strange world within a world that lay under Earth's crust. To rescue him, Tarzan came into that savage, prehistoric land at the head of an expedition equipped with every modern device. But Pellucidar was not like the jungles the ape-man knew. Here were sabre-toothed tigers and every savage creature from the beginning of the time. Here the horizon curved back on itself and the sun was always in the middle of the sky. And now, for the first time, Tarzan was hopelessly lost in a land teeming with unknown, gigantic killers...where even time had no meaning!"
Inasmuch as the Tarzan series was more a series of illustrated short novels than a typical comic strip, the amount of text in each strip far exceeded the amount of text in other comic strips, and consequently of rather small size, about 10 points. In order to make the material more readable, the strips are presented here in halves at about 50% magnification. The color of these images have been manipulated to make them more readable.
One can jump right into the action at the first strip here. On the left side of each comic strip, next to the title, there is a number which indicates that particular strip's position in the series. Some browsers will display this number in the lower left hand corner of the window frame. If someone quits reading some segment of Tarzan at the Earth's Core before having read it all and then at some later date wishes to return to where he left off, this can be done by entering the number of that particular comic strip here.