Flammarion: The Astronomer Who Led the SPR

Camille Flammarion is remembered in English almost entirely as the astronomer who popularized the idea of artificial canals on Mars. What that memory drops is that he spent more than sixty years investigating telepathy, apparitions and hauntings, and that in 1923 he held the presidency of the Society for Psychical Research, the British institution that set the terms for English-language psychical research for a century. The astronomy and the psychical research were the same career, not two separate men.

Flammarion was born on 26 February 1842 and died on 3 June 1925. He became a computer at the Paris Observatory in 1858, founded the Societe astronomique de France and served as its first president, and launched the magazine L'Astronomie in 1882. He ran a private observatory at Juvisy-sur-Orge and received the Prix Jules Janssen, the society's highest award, in 1897.

La planete Mars et ses conditions d'habitabilite (1892) argued that the linear features astronomers were reporting on Mars were artificial canals, irrigation works built by intelligent beings on a dying world. That claim, and a garbled 1910 rumor that he predicted Halley's Comet would poison the atmosphere and end life on Earth, which he had not, he had said the opposite, are what survived into English popular memory. Almost nothing else did.

In 1899, Flammarion ran a public appeal through the Annales Politiques et Litteraires asking readers to report experiences of apparitions, premonitions and telepathic impressions. He received 4,280 replies; 1,824 claimed some paranormal experience; 1,758 contained enough detail to use; 786 were selected as having evidential value. That dataset became the backbone of L'Inconnu et les Problemes Psychiques, published in 1900 and translated the same year as The Unknown, by Harper and Brothers, covering telepathy, apparitions of the dying, premonitory dreams and clairvoyance.

Flammarion sat for seances with the medium Eusapia Palladino and concluded that some physical phenomena he witnessed carried, in his words, the stamp of absolute certainty. But he explicitly rejected the spirit hypothesis as the default explanation for mediumship, favoring instead what he called the psychic forces of the living, an early version of what would later be framed as subconscious or dissociative explanations. That position put him at odds with both committed spiritists and committed skeptics, and is one reason his psychical work is harder to summarize in a single sentence than his astronomy.

The SPR's own list of past presidents places Flammarion in the chair for 1923, between Thomas Walter Mitchell (1922) and John George Piddington (1924-25), in a line that also includes William Crookes, William James, Henri Bergson and Henry Sidgwick. In October 1923 he delivered a presidential address summarizing his conclusions after more than sixty years of investigation. An English-speaking reader who knows Flammarion only through the Mars canals rarely learns that he once held the same seat as James and Bergson.

Flammarion's psychical work is worth separating from his conclusions. He built a real dataset, a public appeal that generated thousands of reported cases, filtered them by evidential standard rather than accepting all of them at face value, and refused to settle for the explanation that was easiest to believe in either direction. That discipline, gather broadly, filter honestly, resist the tidy answer, holds up independently of whether any individual case in his collection was what it claimed to be.