Messrs Richard Freres are bringing some electrical apparatus for exhibition on May 6th. Amongst these is an electricity meter working with a current from 1 to 100 amperes. Messrs Richard want to know what current we can give, so that they may know the size of meter to bring for exhibition as they have several varieties. Please to advise on this matter.
Yrs [Yours] faithfully,
Asst. Sec. RS [Assistant Secretary, Royal Society]'.