Letter from R T [Richard Tetley] Glazebrook, the National Physical Laboratory, Bushy House, Teddington, Middlesex, to [Joseph] Larmor He cannot understand what [James William] Gifford means in a statement referring to Larmor about an error, giving equations. Glazebrook suggests the modification of his earlier sections to include a proof or reference to a proof of the value used. It should tally with what Larmor has told him but one statement still puzzles Glazebrook. Gifford is expecting a letter, and Glazebrook asks if Larmor approves of his approach. With a sheet of equations by Joseph Larmor [?], headed: 'J.W. Gifford'. 23 February 1902