In answer to your application for an exchange of publications, I have the pleasure to inform you that the Council of the Royal Society, on the recommendation of the Library Committee, will be glad to exchange the "Philosophical Transactions" ['Philosophical Transactions of the Royal Society'], biologucal series, for the "Archiv de Sciences Biologiques".
I am, yours truly,
Asst. Sec. R.S. [Assistant Secretary, Royal Society]'.