A meaibor of the liroli Rlcal survey says that Salt Lake will he of tr ot value m tL near luturo, iu/t onlr on account of tli« o-uuiuun /•.ait It w.H produce, but a so lor u»c sodium sulphate it contain*. I he later Is separated In a fiiK tuloat j toi Ij.iuic by the cold weathar of mldw ntcr. and nnoiially thrown up on thu sho o enormous lt;4uani.tl®», I urn nr* u.any oUm *n «a .11 tuo 1-r west wbenc an luax-unusUhlt supply or connnerclnl sisal Jo. may ba obtained at small lt;Mt Mouo i.aav, Cui.. alono below a minute J to hold over ?b(UOO,ult;X) tout of sodium l arbJBattr.