| Description | Harrison returns Dow's paper, 'A comparison of the methods of equality of brightness, flicker, and acuteness of vision, as applied to heterochromatic photometry', in accordance with his request to withdraw it. Standing Orders of the Council of the Royal Society state that the paper is to be regarded as not having been communicated to the Society at all, and he asks for an assurance that Dow understands this point when he acknowledges receipt of his manuscript. |