Biography from AskART: Born in California of German parents on Jan. 1, 1864. Jost (nÈ Joost) was a resident of San Francisco by 1934. He worked there for many years as a freelance artist. He died at Agnew (CA) State Hospital on June 14, 1952.
Source: Edan Hughes, “Artists in California, 1786-1940”
City Directory; Death record.