The Lucasian chair paid very poorly so Stokes needed to earn additional money and he did this by accepting an additional position to the Lucasian chair, namely that of Professor of Physics at the Government School of Mines in London.

Please remove spaces between words.
TheLucasianchairpaidverypoorlysoStokesneededtoearnadditionalmoneyandhedidthisbyacceptinganadditionalpositiontotheLucasianchair,namelythatofProfessorofPhysicsattheGovernmentSchoolofMinesinLondon.