Copy letter from [Sir Alfred Bray Kempe, Treasurer of the Royal Society]; to the Board of Trade, Commercial Department Begins by refering to an earlier letter of the Board of Trade, which stated that a grant of £250 had been sanctioned by the Lord Commissioners of the Treasury to extend the testing work carried out at the Physical Laboratory [of the Royal Society]. Then refers to a second letter, which stated that Their Lordships signify their consent to this proposed expenditure. The copy letter appears unfinished and ends here, withouth any closure or signature. September 1915