INSTITUTION OF CIVIL ENGINEERS
... I INST'I TUTION bi VIoL ENJGlEBRS. ; * .At the last meeting of this society, Mr. James ,impsac, ,PresidantJin' the chdir, the papery read was On the Ver- tical Structure .f:the PrirmsryRocks, and tbe, general cha- 'rsdter of, .their Gold-bearisg. varieties, by. MUr. Evan .- Hopkins. ?? . 1ha author comrniuced by ?? * that it wia aldmest in. .possible' to ferm ?? correct idea of I the true ...