Letter from F J W Whipple of 6 Addison Road, Bedford Park W4 to W H Dines The Director had given Whipple a note of Dines; discusses Dines proof re coefficients. Mentions Chapman's paper and wonders how it ever got into print, as it is full of 'howlers' and hopes Dines will publish a reply. Chapman does not see that the errors in pressure and temperature at a given height must be corrected. Wishes him and his family the compliments of the season. 24 December 1920