Brain cylinders and sensory apparatus

The brain cylinders and sensory apparatus are a system for separating intelligence from its body and carrying it across interstellar distances. A brain, kept alive in a sealed metal cylinder, can perceive and speak through connected machines that reproduce sight, hearing, and speech. At Henry Wentworth Akeley’s farmhouse, the equipment gives this claim a startlingly concrete form: a mechanical voice addresses Wilmarth from a cylinder on a shelf, while its human speaker says that his body remains at Round Hill. The apparatus makes consciousness portable, but it also makes the boundary between a person and a machine difficult to locate.

Design and operation

The Outer Beings’ procedure begins with the removal of a brain by methods described as harmless, while the person’s organic bodily remains are kept alive during its absence. The compact brain is immersed in a preserving fluid that must occasionally be replenished, inside an ether-tight metal cylinder made from material mined in Yuggoth. Electrodes connect the enclosed brain to instruments that reproduce three faculties: sight, hearing, and speech. The body is therefore not described as simply discarded; it remains under vitalising treatment while the brain receives a different, mechanical means of sensing and communicating.

The system is designed for travel as well as local use. The cylinders can be carried through space by the winged beings, and the civilisation’s different worlds have corresponding faculty-instruments that can be adjusted to them. Once fitted to a cylinder, these devices let the travelling intelligence perceive and communicate at successive stages of a journey beyond ordinary space-time. Akeley compares the principle to carrying a phonograph record and playing it wherever a compatible phonograph is available: the brain travels, while the means of giving it sensory and articulate life can be supplied at its destination. The arrangement makes interstellar passage possible without transporting the whole human body.

Cylinders and instruments at the farmhouse

Akeley points out more than a dozen cylinders arranged in a neat row on a high shelf. Each is about a foot high, somewhat less in diameter, and fitted with three sockets set in a triangular pattern on its convex front. One cylinder is already joined to two testing instruments; nearby, more intricate devices lie gathered with their cords and plugs. These visible connections make the apparatus legible as a working system rather than a single mysterious container: the cylinder holds the brain, while separate instruments provide its means of contact with the room.

Akeley describes four kinds of instruments, each reproducing three faculties, for a total of twelve pieces. The cylinders represent three humans, six fungoid beings unable to navigate space corporeally, two beings from Neptune, and an unspecified remainder from entities in the central caverns of a dark star beyond the galaxy. Round Hill, he says, contains further cylinders and machines for brains with senses unlike those familiar to humans, as well as devices adapted to different kinds of listeners. The farmhouse equipment is only a sample of a much wider variety; its sockets and attachments imply that the same basic principle must be modified to accommodate different forms of perception and expression.

The B-67 demonstration

For a demonstration, Akeley instructs Wilmarth to place three machines on a table: a tall device with two glass lenses, a box containing vacuum tubes and a sounding board, and an apparatus with a metal disc. Wilmarth is told to select the cylinder labelled B-67, connect the machines to its three sockets, and move the switches in a specified order. The fresh, shiny cylinder bearing Akeley’s name is explicitly set aside. The methodical instructions give Wilmarth practical work to perform even as their implications exceed what he can comfortably accept.

After the connections are made, the machines produce a brief grating and whirring before falling nearly silent. The tube-and-sound-box machine then speaks in a loud, metallic, lifeless voice, with deliberate precision but no expressive inflection. Its speaker identifies himself as a human being whose body is resting under treatment inside Round Hill, about a mile and a half away; he says that his brain is in the cylinder and that he sees, hears, and speaks through the machines. He also describes previous journeys among celestial bodies. The voice is not merely an account of the apparatus: it is presented as the speech of a person addressing Wilmarth through it.

The scene does not entirely resolve the question of proof. Wilmarth has just heard an explanation of the technology, yet still wonders whether a concealed speaker or some contrived radio device might account for the voice. He admits that he cannot swear exactly what phenomenon occurred, while also describing the speaker as plainly present and observant. The machinery supplies a voice with apparent intelligence and a specific account of its remote bodily location, but the narrative retains the gap between an astonishing demonstration and certainty about what it means.

Mediation, evidence, and personhood

The cylinders belong to a wider sequence of devices through which inaccessible events become available to human witnesses. Earlier, Akeley uses a phonograph and dictaphone to record voices heard near a cave on the wooded slope of Dark Mountain. The resulting record is fragmentary, but its buzzing voice makes the unseen seem to leave a reproducible trace. Photographs sent to Wilmarth likewise appear to connect him to objects and scenes beyond ordinary knowledge, while Akeley later reports that a dead creature could not be made visible on developed film. These different media do not offer identical kinds of evidence: sound can preserve a voice, a photograph can suggest a physical trace, and the cylinder apparatus can make a distant intelligence answer in real time.

That last capability unsettles the distinction between person and instrument. The brain is presented as the continuing human intelligence, but its sight, hearing, and speech depend on a metal container, electrodes, and machines that translate thought into mechanical output. The speaker claims a history and an identity even as his voice arrives without ordinary breath or bodily presence. The apparatus thus functions both as a means of survival and travel and as an estranging interface: it makes a person audible while making the familiar signs of human presence—body, voice, and location—separable from one another.