Jacquemont, Victor(1801–1832), French botanist in India, age 31, of dysen­tery or malaria.

Jussieu, Joseph de (1704–1779), doctor and botanist on the Geodesic Mission to the Equator (1735-1744), made the first scientific study of the cinchona (quinine) tree; at age 75, of mercury poisoning and infection.