|Thanking Boys for his letter of 19 December and the copy of Boys's lecture. Such matters have been of interest to De Horsey since he attended Faraday's lectures. Discusses Boys's work and values for the gravitational constant and mass of the Earth, reported as weight in the popular press. Admits his ignorance and poses various questions accordingly, since 'G eludes me'. Weight is entirely relative. he concludes and apologises for his prolixity. In a postscript, he encloses a newspaper cutting [present] which he thinks may be of interest to Boys. The period of recurrance of the Ice Age would depend upon any convulsion changing the centre of gravity of the planet and the gyroscopic motion of the pole. Drayson's system is considered heresy and several astronomers who have admitted his proofs have asked that their names should not be associated with him as this would be professionally injurious. With an additional sheet of calculation commencing 'Given two bodies each of 10 tons mass...'.