Confides that the past year has been 'a sombre one ... but not unhappy.'
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Confides that the past year has been 'a sombre one ... but not unhappy.'
Considering motion as a 'successive excitement of powers.'
Thanks JH for JH's translation of Friederich Schiller's poem 'The Walk.'
Jokes about WH's recent 'astronomical insignificance.'
Sends copies of three letters by G. B. Airy on proposed railway through Greenwich Park. Asks JH's opinion on possible effects on observatory.
Elated that WH's account of the generation of an ellipsoid is an original result.
Sends some results concerning undisturbed parabolic motion. Laments the Irish famine.
Sends some new theorems concerning undisturbed parabolic motion; believes that much remains to be discovered in this field.
Wants WH's quaternion mathematics to be challenged; also worries that quaternions will become merely 'a private and personal skill' instead of a method that can be taught.
The equatorial on the Dublin Observatory dome needs improvement. In the last fifty-two months, WH has seen three new planets: Neptune, Iris, and Flora.
WH notes that quaternions derive some interesting results in problems with three moving bodies.
Describes the funeral of James MacCullagh; mystified why he committed suicide.