Apergy is a fictitious form of anti-gravitational

Anti-gravity

Anti-gravity is the idea of creating a place or object that is free from the force of gravity. It does not refer to the lack of weight under gravity experienced in free fall or orbit, or to balancing the force of gravity with some other force, such as electromagnetism or aerodynamic lift...

 energy described by Percy Greg

Percy Greg

Percy Greg , son of William Rathbone Greg, was an English writer....

 in his sword and planet

Sword and planet

Sword and Planet is a subgenre of science fantasy that features rousing adventure stories set on other planets, and usually featuring Earthmen as protagonists. The name derives from the heroes of the genre engaging their adversaries in hand to hand combat primarily with simple melee weapons such as...

 novel Across the Zodiac

Across The Zodiac

Across the Zodiac: The Story of a Wrecked Record is a science fiction novel by Percy Greg, who has been credited as an originator of the Sword and planet sub-genre of science fiction.- Plot :...

.

It is also used by John Jacob Astor IV

John Jacob Astor IV

John Jacob Astor IV was an American businessman, real estate builder, investor, inventor, writer, lieutenant colonel in the Spanish-American War and a member of the prominent Astor family...

 in his 1894 science fiction novel, A Journey in Other Worlds

A Journey in Other Worlds

A Journey in Other Worlds: A Romance of the Future is a science fiction novel by John Jacob Astor IV, published in 1894.The book offers a fictional account of life in the year 2088...

.

Apergy can also be found in an 1888 article by Clara Jessup Bloomfield-Moore, called "Some Truths About Keely". In it, apergy is used to describe the latent force John Keely harnessed, by using frequency to release the latent force found within all atomic matter

Matter

Matter is a general term for the substance of which all physical objects consist. Typically, matter includes atoms and other particles which have mass. A common way of defining matter is as anything that has mass and occupies volume...

.

In Chris Roberson

Chris Roberson (author)

Chris Roberson is a science fiction author, tromboner, and publisher based in Austin, Texas, best known for alternate history novels and short stories.-Biography:Chris Roberson grew up near Dallas, Texas, and attended the University of Texas, Austin...

's short story "Annus Mirabilis" from the second volume of Tales of the Shadowmen

Tales of the Shadowmen

Tales of the Shadowmen is an annual anthology of short stories edited by Jean-Marc Lofficier and Randy Lofficier, published by . As of 2010, seven volumes have been released, with a eighth slated for late 2011...

, Doctor Omega

Doctor Omega

Doctor Omega is a fictional character created by French writer Arnould Galopin for his science fiction novel Le Docteur Oméga , visibly inspired by H. G...

 and Albert Einstein

Albert Einstein

Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history...

 investigate apergy. Apergy is also mentioned in the Warren Ellis

Warren Ellis

Warren Girard Ellis is an English author of comics, novels, and television, who is well-known for sociocultural commentary, both through his online presence and through his writing, which covers transhumanist themes...

 comic Aetheric Mechanics

Aetheric Mechanics

Aetheric Mechanics is a graphic novella created by Eagle Award-winning writer Warren Ellis. It is 48 pages long, illustrated in black and white by Gianluca Pagliarani, and retailing at US$6.99...

, as being generated by Cavorite technology from The First Men in the Moon

The First Men in the Moon

The First Men in the Moon is a 1901 scientific romance novel by the English author H. G. Wells. The novel tells the story of a journey to the moon undertaken by the two protagonists, the impoverished businessman Mr Bedford and the brilliant but eccentric scientist Dr. Cavor...

.

In S. P. Meek

S. P. Meek

Sterner St. Paul Meek was a US military chemist, early science fiction author, and children's author. He published much of his work first as Capt. S.P. Meek, then, briefly, as Major S.P. Meek and, after 1933, as Col. S. P. Meek. He also published one story as Sterner St...

's short story "Cold Light", which appeared in Astounding Stories of Super-Science, March 1930, apergy is mentioned as the opposite force of gravity.