Experiential Typewriter

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"For us these neurological numbers take on the meaning of mantras" (Psychedelic Review, 70).

The ‘mantra’ reprinted to the left corresponds to “astonishing statistics about the nervous system and potentialities of consciousness.” Leary states that “We can think or speak at he rate of three words a second. That means that one – thousand-million-minus-three registrations cannot be communicated” (70-71). The ingestion of psychedelic foods or drugs supposedly allows us to tap into some of this neural activity, but the ability to communicate subjective experiences diminishes.


The experiential typewriter’s design is credited to Dr. Ogden Lindsley of the Hsvsrd Medical School and William Getzinger, electronic engineer with MIT’s Lincoln Laboratory. An internally modified Esterline Angus operational recorder

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Esterline Angus Chart Recorder


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Keyboard Diagram

Theoretical Concepts The Thing Itself

Comments by others

Although Psychedelics Encyclopedia (1992) suggests that a prototype for such a machine was attempted but never reached a functioning state,” the original 1966 article features data gathered from tests run: “The first session was run as a control period, without drugs. The set was to meditate in silence. The second recording was made three hours after the ingestion of 250 gamma of LSD. Both sessions were run in a very small room; the subject lay on a mattress on the floot, hands resting easily on the two keyboards of the E.T. The console and recorder were ;in an adjacent room. The room was lit by one candle; actually the subject kept his eyes closed throughout both sessions” (83). Setting and subject positioning of these experiments are similar to the type within a {SOURCESOURSEXXXXXXXX) constructed behing the kitchen wall of

In an article from 2006, Marko comments that "While insightful as to the timing of the various phases of the experience(e.g. onset, encounter, comedown), the results of these experiments only provide a real-time subjective assessment of the experience. This experimental methodology only provides a more objective understanding to the course of events during DMT inebriation."


Leary, Timothy. "The Experiential Typewriter." Psychedelic Review 7. 1965.

  • Rodriguez, Marko A. "A Methodology for Studying Various Interpretations of the

N,N-dimethyltryptamine-Induced Alternate Reality." 2006