Rev. Humphrey Lloyd's paper on conical refraction agreed with WH's conclusions.
Rev. Humphrey Lloyd's paper on conical refraction agreed with WH's conclusions.
Encouraged that a calculus can be constructed out of his exponential series findings.
Sorry to hear that JH was not elected President of the R.S.L. Sending a supplement to WH's 'Theory of Systems of Rays' essay. Recommends [Edwin Richard Windham Wyndham-Quin,] Lord Adare for consideration as a member of the R.A.S.
Developed a method that greatly simplifies Joseph Lagrange's integration of the 3n differential equations of motion of the second order by reducing all calculations to the application of 'one principal function.' Applies the method to planetary motion.
Congratulates JH on his successful Cape Town enterprise.
Pleased that the Royal Irish Academy awarded its Science Medal to James MacCullagh for his paper on the "Laws of Crystalline Reflexion and Refraction;" he deems MacCullagh's essay superior to WH's "On Algebra as the Science of Pure Time.","L
Asks JH to keep him updated on English research of the dynamics of light. Currently considering the 'propagation' of light waves, as distinguished from their mere 'preservation'; asks whether this is a new study.
In reply to WH's 1839-2-8 inquiry, JH believes that 'Skotodynamics' (the propagation of light waves) is a new line of research. Caroline Herschel is ecstatic about her Royal Irish Academy medal.
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.