c. 1816 AD
Laennec’s stethoscope
Medicine · Science
René Laennec devises the stethoscope and develops mediate auscultation; he published his treatise on the method in 1819. The innovation changes physical examination without replacing its other clinical methods on its own.
Precision, calendar, and review
- Start
- year · approximate
- Calendar and convention
- Historical-era years; the source calendar is not identified. No conversion of days is assumed.
- Year zero
- The scale goes from 1 BCE to 1 CE without year zero. Changing era names changes labels only.
- Documentary review
- Date not recorded
Reading the date: point event.
Sources
- www.ncbi.nlm.nih.gov (opens in a new tab)
Source provenance and scope
- Publication date
- Pending verification: the source could not be accessed
- Bibliographic date checked
- 2026-09-23
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