Sends copies of three letters by G. B. Airy on proposed railway through Greenwich Park. Asks JH's opinion on possible effects on observatory.
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Sends copies of three letters by G. B. Airy on proposed railway through Greenwich Park. Asks JH's opinion on possible effects on observatory.
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.
Describes the funeral of James MacCullagh; mystified why he committed suicide.
Considering motion as a 'successive excitement of powers.'
Confides that the past year has been 'a sombre one ... but not unhappy.'
Thanks JH for JH's translation of Friederich Schiller's poem 'The Walk.'
Jokes about WH's recent 'astronomical insignificance.'
Elated that WH's account of the generation of an ellipsoid is an original result.
Sends some new theorems concerning undisturbed parabolic motion; believes that much remains to be discovered in this field.
Sends some results concerning undisturbed parabolic motion. Laments the Irish famine.
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.