▁character , ▁besides ▁lect uring ▁and ▁exam ining . ▁He ▁was ▁editor ▁of ▁Cass ell ' s ▁Natural ▁History ▁( 6 ▁vol s . ▁ 1 8 7 6 - 8 2 ), ▁to ▁which ▁he ▁contributed ▁several ▁important ▁articles . ▁He ▁wrote ▁a ▁Pr imer ▁of ▁Phys ical ▁Geography ▁( 1 8 8 2 ) ▁; ▁a ▁small ▁volume ▁of ▁bi ograph ies ▁of ▁botan ists , ▁ge olog ists , ▁and ▁zo olog ists ▁entitled ▁Hero es ▁of ▁Science ▁( 1 8 8 2 ) ▁; ▁another ▁on ▁The ▁Sea - sh ore ▁( 1 8 7 9 ); ▁and ▁an ▁Abstract ▁of ▁the ▁Ge ology ▁of ▁India , ▁ 1 8 7 5 , ▁which ▁reached ▁a ▁third ▁edition ▁in ▁ 1 8 8 1 ; ▁besides ▁contrib uting ▁to ▁various ▁period ical s , ▁assist ing ▁in ▁prepar ing ▁the ▁third ▁edition ▁of ▁Griff ith ▁and ▁Hen f rey ' s ▁Micro graph ic ▁Dictionary ▁( 2 ▁vol s . ▁ 1 8 7 5 ), ▁and ▁revis ing ▁the ▁fourth ▁edition ▁of ▁Ly ell ' s ▁Student ' s ▁Element s ▁of ▁Ge ology ▁( 1 8 8 5 ). ▁ ▁His ▁separate ▁scientific ▁papers ▁are ▁not ▁less ▁than ▁a ▁hundred ▁in ▁number , ▁and ▁his ▁' Supp lement ' ▁to ▁the ▁T ert i ary ▁and ▁Second ary ▁Cor als ▁forms ▁a ▁volume ▁in ▁the ▁publications ▁of ▁the ▁Pala e ont ographical ▁Society . ▁The ▁' T ert i ary ▁E ch ino idea ▁of ▁India '