00678cam a22002171 4500 ca 07003696 DLC 20260227111044.0 950824s1874 cau 000 0 eng ca 07003696 (OCoLC)33037590 DLC CCC DLC premarc HE7677.M6 B62 Bloomer, John Godfrey, comp. Pacific cryptography, for the use of operators in mining stocks, mining superintendents, bankers and brokers, by J.G. Bloomer ... 2d ed. San Francisco, J.G. Bloomer, 1874. 164. p. 19 cm. Cipher and telegraph codes Mining. 13584 13584