Memorial book of Drohobycz, Boryslaw and Surroundings - Hardcoverby N. M. Gelber (Editor), Jonathan Wind (Prepared by), Stefanie Holzman (Index by) The discovery of rich oil and mineral wax deposits in the Drohobycz Boryslaw area in the 1850s turned it into an industrial and economic powerhouse "the California of Galicia." Jewish owned industries started up: refineries, mining, spinning, weaving, and factories producing candles and soap. By the early 1900s, Drohobycz alone had two synagogues, four study houses, two