''Nelson's Perpetual Loose Leaf Encyclopaedia: An International Work of Reference'' was an

encyclopedia An encyclopedia (American English) or encyclopædia (British English) is a reference work or compendium providing summaries of knowledge either general or special to a particular field or discipline. Encyclopedias are divided into articles ...

originally published in twelve volumes by

Thomas Nelson and Sons Thomas Nelson is a publishing firm that began in West Bow, Edinburgh, Scotland, in 1798, as the namesake of its founder. It is a subsidiary of HarperCollins, the publishing unit of News Corp. It describes itself as a "world leading publisher a ...

starting with Volume 1 in 1906 through to Volume 12 in 1907. It was published in

loose leaf A loose leaf is a piece of paper of any kind that is not bound in place, or available on a continuous roll, and may be punched so as to be organized in a ring binder. Loose leaf paper may be sold as free sheets, or made up into notepads, where p ...

format; subscribers received updates every six months.advertisement, ''

Popular Science Monthly ''Popular Science'' (also known as ''PopSci'') is an American digital magazine carrying popular science content, which refers to articles for the general reader on science and technology subjects. ''Popular Science'' has won over 58 awards, inclu ...

'', January 1930
p. 9
/ref> Its editor-in-chief was John H. Finley. It ceased publication in approximately 1934. A contemporary review in ''

The New York Times ''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid ...

'' read:

... the book that literally never does grow old, that has a concise, authoritative statement on the memorable event of yesterday as well as on the event that occurred thousands of years ago; the book that is never finished, and that nevertheless has the latest word on pretty much any subject regarding which immediate information is desired, seems very much like the wild and insubstantial dream of some overworked press agent, were it not that the thing has actually been accomplished, that the book in question really does exist ...

The first edition of ''Nelson's Encyclopaedia'' was published in 1904 with a conventional binding.

Advertising slogans

Some slogans used in advertising it include:"A New Encyclopaedia Today", "Still New Six Months from Today!", "STILL NEW Ten Years from Today!", "The Encyclopaedia for a Lifetime!", and "NELSON'S PERPETUAL LOOSE-LEAF ENCYCLOPAEDIA Never Grows Old"

Binding

The pages of the encyclopedia are bound using a locking device patented by Charles E. Baldauf and designed specifically for updating an encyclopedia, "which is to be supplied from time to time with additional insertion pages of printed matter ..."."Loose-leaf binder", U.S. Patent US1071500A, filed September 14, 1907, published August 26, 1913

Notes

External links

Full text at

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American encyclopedias English-language encyclopedias 1907 non-fiction books Thomas Nelson (publisher) books {{US-book-stub