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August, I9o6.] Notes and Comments--Book Notices. 159 CHILEAN NITRATE DEPOSITS. According to recent publications by Semper and Michels (Berlin, Ernst, 19o4), the various theories hitherto proposed to explain the formation of the Chilean saltpeter deposits (microbes, varech, guanos, etc.) must give way to those formulated by the saliteros, or Chilean miners, who ascribe the formation of saltpeter to atmospheric electricity. There is a remarkable amount of mist surcharged with electricity in thedoi:10.1016/s0016-0032(06)90312-3 fatcat:w6vfxkyqerablaagsfn5byy4km