National Geographic : 1944 Sep
o Acme Derricks Suggest Tzeliutsing Is an Oil Field, but Smokestacks Prove It's aSaltworks Supported by a jungle of ropes, the 120-foot derricks hoist 80-foot-long brine buckets from the wells. Puffs of steam reveal themotive power-donkey engines. The haze is coal smoke (only a part of the evaporating plants burn natural gas). A reservoir (right) contains water forleaching subterranean rock salt.