Phosphorus Anhydride Apparatus by Lewis H. Latimer (1881)
Drawing
This technical drawing, created by Lewis H. Latimer in 1881, illustrates a phosphorus anhydride apparatus. The schematic depicts various scientific and mechanical components, including:
A chemical reaction chamber (possibly for phosphorus processing).
A series of interconnected glass containers for chemical separation or filtration.
A large funnel-like structure leading to a collection container at the bottom.
A mechanical hand-crank system, which likely regulates some aspect of the process.
Latimer’s signature is visible, along with the date 1881, reinforcing its authenticity.

Lewis H. Latimer, primarily known for his contributions to electric lighting technology, also engaged in chemical and mechanical inventions. This diagram suggests his involvement in scientific apparatus design, possibly for industrial or laboratory use. The phosphorus anhydride process might have been related to chemical drying agents, gas production, or early industrial lighting applications. The presence of a lamp or lighting component at the top left suggests a connection to illumination technology.
Latimer Family Papers (1870-1996 ) [QPL Full Collection]
Visible text in the drawing: "Witnesses." "Phosphorus Anhydride Apparatus" "Inventor: L.H. Latimer" "1881"