# The Expression of the Emotions (1872) is a dated comparative-physiology treatise using photographs as evidence, not as a later clinic

Date: 1872

## The fact

In 1872 The Expression of the Emotions published comparative physiology of expression, including photographic plates. The instrument is that dated treatise, not a later psychology clinic. Charles Darwin's documented role is: He wrote the 1872 book, including Duchenne and studio photographs. Photographers and asylum correspondents share the plates. He did not found a hospital.

## Context

Duchenne and unnamed photographers share the plates. Sharing them is required. The setting of The Expression of the Emotions (1872) is a dated comparative-physiology treatise using photographs as evidence, not as a later clinic is the public file around 1872-01-01. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Driver health-system-capacity is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

## Evidence and sources

Official locator: Darwin Online — The Expression of the Emotions in Man and Animals (1872) at https://darwin-online.org.uk/ (Darwin Online / University of Cambridge). Independent locator: Britannica — Darwin, Expression of the Emotions neighbourhood at https://www.britannica.com/biography/Charles-Darwin (Encyclopaedia Britannica). Official carrier: Darwin Online — The Expression of the Emotions in Man and Animals (1872) (https://darwin-online.org.uk/; Darwin Online / University of Cambridge). Independent carrier: Britannica — Darwin, Expression of the Emotions neighbourhood (https://www.britannica.com/biography/Charles-Darwin; Encyclopaedia Britannica).

Official or archival record: Darwin Online — The Expression of the Emotions in Man and Animals (1872) (https://darwin-online.org.uk/; Darwin Online / University of Cambridge).

## Significance

Improving path from The Expression of the Emotions (1872) is a dated comparative-physiology treatise using photographs as evidence, not as a later clinic on 1872-01-01. A public comparative-expression treatise is a health-and-physiology path of medium weight. The welfare reading on this path is improving.

If a number is not in the two records named above, it is not supplied here.

## What is established and what is not

Established: a sourced public record of The Expression of the Emotions (1872) is a dated comparative-physiology treatise using photographs as evidence, not as a later clinic under 1872-01-01 for Charles Darwin. Established: a sourced public record of The Expression of the Emotions (1872) is a dated comparative-physiology treatise using photographs as evidence, not as a later clinic under 1872-01-01.

Confidence is stated on the impact path, not hidden in adjectives. Photographs here are evidence in a book, not a 2009 festival. Do not twin with Origin. Mixed effects of The Expression of the Emotions (1872) is a dated comparative-physiology treatise using photographs as evidence, not as a later clinic are separate paths.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

The attached driver is health-system-capacity. The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

Shared responsibility is part of The Expression of the Emotions (1872) is a dated comparative-physiology treatise using photographs as evidence, not as a later clinic. Naming Charles Darwin does not delete co-authors, institutions, or later transmitters. The lag from 1872-01-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

## People

- Charles Darwin: https://factrail.ai/people/charles-darwin

## Drivers

- Health-System Capacity: https://factrail.ai/drivers/health-system-capacity

## Sources

- https://darwin-online.org.uk/
- https://www.britannica.com/biography/Charles-Darwin

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/dar-expression-1872