De Camp and Ley have claimed ( in their Lands Beyond ) that Leonhard Euler also proposed a hollow-Earth idea, getting rid of multiple shells and postulating an interior sun across to provide light to advanced inner-Earth civilization but they provide no references ; indeed, Euler did not propose a hollow-Earth, but there is a slightly related thought experiment.

De Camp and Ley also claim that Sir John Leslie expanded on Euler's idea, suggesting two central suns named Pluto and Proserpine ( this was unrelated to the dwarf planet Pluto, which was discovered and named some time later ).

In particular, De Camp argued the plots of the novels are heavily driven by coincidence ; while many things just happened in the romances, the novels are still weakened by the dependence on it.

De Camp was born in New York City, one of three sons of Lyon de Camp and Emma Beatrice Sprague.

De Camp once noted that he rarely used pen-names, " partly because my own true name sounds more like a pseudonym than most pseudonyms do.

An aeronautical engineer by profession, De Camp conducted his undergraduate studies at the California Institute of Technology ( where his roommate was at one point noted rocket fuel scientist John D. Clark ), and earned his Bachelor of Science degree from Caltech in Aeronautical Engineering 1930.

De Camp was also a surveyor and an expert in patents.

De Camp eventually rose to the rank of lieutenant commander in the U. S. Navy as a reserve officer.

De Camp was a member of the all-male literary and dining club the " Trap Door Spiders " in New York City, which served as the basis of Asimov's fictional group of mystery solvers the " Black Widowers ".

De Camp himself was the model for the character named " Geoffrey Avalon ".

De Camp was also a member of the Swordsmen and Sorcerers ' Guild of America ( SAGA ), a loosely-knit group of Heroic fantasy writers that was founded during the 1960s.

De Camp was a materialist who wrote works examining society, history, technology and myth.

De Camp had the mind of an educator, and a common theme in many of his works is a corrective impulse regarding similar previous works by other authors.

De Camp wrote a number of lesser-known but nonetheless significant works that explored such topics as racism, which he considered to be more accurately described as ethnocentrism.

De Camp was best known for his light fantasy, particularly the " Harold Shea " series and " Gavagan's Bar " series, both written in collaboration with his longtime friend Fletcher Pratt.

De Camp also produced a few more of this genre on his own.

De Camp wrote three sword and sorcery sequences of note.

De Camp also wrote historical fiction, set in the era of classical antiquity from the height of the Persian Empire to the waning of the Hellenistic period, which forms a loosely-connected series based on their common setting and occasional cross references.

De Camp was guest of honor at the 1966 World Science Fiction Convention.

De la Union sent Montforte with 2, 800 infantry and 800 cavalry to reinforce the Camp of Trompettes and Del Puerto with 2, 000 more to help Venegas.

De La Soul have influenced numerous other hip hop artists such as Camp Lo, The Black Eyed Peas, and Digable Planets.

Upon the urging and encouragement of the activist Cardinal Archbishop of Manila Jaime Sin, millions of Filipinos trooped to Camp Aguinaldo along Epifanio De los Santos Avenue ( EDSA ), where Enrile and Ramos have been holding operations, to give their moral support and prayers for the reformist soldiers.

In comedy he was ably supported by his wife, Marie Therese De Camp, whom he married on 2 July 1806.

The following works are of doubtful authenticity: De spectaculis (" On Public Games "); De bono pudicitiae (" The Virtue of Modesty "); De idolorum vanitate (" On the Vanity of Images ," written by Novatian ); De laude martyrii (" In Praise of Martyrs "); Adversus aleatores ; De duobus montibus Sina et Sion ( On the Two Mountains Sinai and Zion ); Adversus Judaeos ; and the Cena Cypriani (" Cyprian's Banquet ", which enjoyed wide circulation in the Middle Ages ).

Along with De La Soul, the group was a central part of the Native Tongues Posse, and enjoyed the most commercial success out of all the groups to emerge from that collective.

For some time after this De Geer enjoyed considerable popularity.

De Funès began his show business career in the theatre, where he enjoyed moderate success.

He praised the performance of Patrick Stewart as Captain Picard, describing his as a " damn fine actor " and enjoyed John De Lancie as Q.

Pinza succeeded the great Italian basses Francesco Navarini and Vittorio Arimondi, both of whom enjoyed international opera careers during the late 19th and early 20th centuries, and Nazzareno De Angelis, who arrived on the scene in the early 1900s.

His psychological novels, such as De Boeken der Kleine Zielen ( 1901 – 1902 ; translated as ' The Books of the Small Souls ') and Van Oude Menschen, de Dingen, die Voorbij gaan ... ( 1906: translated as ' Of old people and the Things that Pass ') enjoyed much success in the English speaking countries after the First World War.

De Gasperi enjoyed considerable support in the US, where he was seen as the man who could oppose the rising tide of Communism – in particular the PCI, which was the biggest communist party in a Western European democracy.

Neapolitan has enjoyed a rich literary, musical and theatrical history ( notably Giambattista Basile, Eduardo De Filippo, Salvatore di Giacomo and Totò ).

Lovecraft, who enjoyed sprinkling references to his friends ' fictional creations in his own Cthulhu Mythos efforts, repeatedly mentioned De Vermis Mysteriis in his stories.

De Silva enjoyed the captaincy, making two half-centuries and taking three wickets with tight bowling on pitches that didn't suit his bowling style.

* De Thermis Britannicis ; but it is doubtful whether this work was ever printed

Menem was seen as frivolous, and De la Rúa as doubtful, so Kirchner worked to be seen as serious and determined.

In contrast, De Vincenzi and Mertens ( 1994 ) argue that the evidence for an association, at least from small-scale surveys, is doubtful and hence not conclusive enough to qualify circumcision as an intervention.

# De Misericordia et Justitia ( On Mercy and Justice ), a collection of biblical extracts and sayings of Church Fathers with commentary ( an important work for the history of church law and discipline ), which is to be found in the Anecdota of Martène, vol.

One of the first and throughout its history one of the most significant treatises of the common law, Bracton ’ s De Legibus et Consuetudinibus Angliae ( On the Laws and Customs of England ), was heavily influenced by the division of the law in Justinian ’ s Institutes.

While many older Soviet and European cars remain in service in Cuba, they are largely eclipsed by the island's great 1950s Cadillacs, Packards, De Sotos and similar products from one of the most ornate styling periods in U. S. auto history.

De Pizan was greatly interested in history, from the Matter of Troy to the " founding of the royal house of France " ( for her the latter was a consequence of the former ).

Armstrong and De Forest fought a protracted legal battle over the rights to the " regenerative " oscillator circuit which has been called " the most complicated patent litigation in the history of radio ".

Yet those who did not appreciate it as model of history could still admire the style of writing — as Dionysius of Halicarnassus praises its sweetness and charm ( De Thuc.

This argument has a long history, and can be traced back at least as far as Cicero's De Natura Deorum ii. 34.

* De Mortibus Persecutorum has an apologetic character, but has been treated as a work of history by Christian writers.

Dioscorides ' De Materia Medica is often said to be the oldest and most valuable work in the history of pharmacology.

Because of this and his earlier support for De Gaulle he became Governor General of the Afrique Equatoriale Française ( AEF ) in 1940, the first not white to achieve this position in French colonial history.

" The significance of De inventione dialectica for the history of argumentation is that it assimilated the art of dialectic to that of rhetoric.

Wireless detailed history and growth of the art includes the work of Nikola Tesla, Oliver Lodge, Marconi, Braun, Reginald Fessenden ( known for inventing the radiotelephony ), John Ambrose Fleming, Lee De Forest and many others.

* August – Polydore Vergil completes De inventoribus rerum, the first modern history of inventions.

The history of these statements can be traced back to Aristotle's On Generation and Corruption and Cicero's De natura deorum, through Blaise Pascal and Jonathan Swift, and finally to modern statements with their iconic typewriters.

De Camp's science fiction is marked by his interests in linguistics, historical forces, and the history and philosophy of science.

De Camp's most highly regarded works in the genre are his time travel and alternate history stories, including Lest Darkness Fall ( 1939 ), " The Wheels of If " ( 1940 ), " A Gun for Dinosaur " ( 1956 ), " Aristotle and the Gun " ( 1958 ), and The Glory That Was ( 1960 ) – in the last of which the " time travel " actually turns out to be a tour de force of historical recreation.

De Broglie had intended a career in humanities, and received his first degree in history.

De Bary was devoted to the study of the life history of fungi.

De Bary studied the developmental history of Myxomycetes ( slime molds ), and thought it was necessary to reclassify the lower animals.

The authors of the " Arab Noise and Ramadan Nights: Rai, Rap, and Franco-Maghrebi Identity " state that The French rappers rap about " the history of slavery, humanity's origins in Africa, Europe's destruction of African civilizations and the independence struggle led by the Front De Liberation Nationale.

De Broglie – Bohm theory has a history of different formulations and names.

Martin Gerbert published a two volume history of sacred music titled De cantu de musica sacra in 1774.

So too is Alexander Neville's 1575 Latin history of the rebellion, De furoribus Norfolciensium.