By the courtesy of the Editor I have read Mr. Richards's letter, and think that he and I disagree solely by reason of the difference in our Indian experiences. If it were a case of starting with a clean sheet there would be no greater difficulty in adopting the metric system than in adopting any other; but this is not the case. The British yard has become very widely known, whereas the metre is quite unknown. The Peshawari yard and the Ilahi gaz, themselves variable units, are used only to a comparatively small extent, while the most widely known unit of length, the hath or cubit, is very near to half the British yard, and as a matter of practical fact this measure is regarded as representing it exactly.