Second letter from John Hopkinson, regarding a paper 'Electrostatic capacity of glass' by John Hopkinson Has not read the papers of Ludwig Boltzmann as they are inaccessble in 'in this part of the world'. Will endeavour to read them on his return to London in the new year. Suggests printing the paper as it stands, and adding a note to the proofs. Has been in contact with Mr White to confirm he [the author] would like seventy copies of the paper. Subject: Physics and Chemistry [Published in the Philosophical Transactions of the Royal Society, 1878] 20 November 1877