Asks GA for a copy of G. F. J. A. Auwers's nebula catalogue [see GA's 1862-11-17], and a sample of the nebula listing for JH's catalogue.
Asks GA for a copy of G. F. J. A. Auwers's nebula catalogue [see GA's 1862-11-17], and a sample of the nebula listing for JH's catalogue.
Regarding financial affairs. Is having trouble with his eyes. Has done little of late.
Sorry to hear of his illness. Answers to his queries regarding the colloid state of ice. Cannot agree about metals of alkalis and earths uncombined in the earth.
Comments on the recent meeting at the R.A.S. when A. D'Orsan's book was shown.
JH's reply to WC's 1862-4-21.
Outlines the differences between the telescope of his own father and that of Lord Oxmantown [William Parsons]. Comments on various lenses. Sends him a little work of his own on telescopes.
Thanks for fine engravings; is concerned about the 'miraculous phenomena' depicted on some other people's engravings, 'especially American ones.'
The family is complaining about not having any news from AH; comments about AH's explanation of the color of copper sulfate by twilight.
Encourages AH in his intention to apply for a position at the University of Glasgow; gives AH advice about fulfilling his university responsibilities.
JH's inability to concentrate; comments in reply to AD's 1862-4-19 and 1862-4-29.
Hopes AD will be successful in his projected paper on the infinity of magnitude. Does not recollect the paper by J. J. Sylvester. Has had a letter from Manchester on his own theory of eternal existence.
On preparing convenient small tables to be carried with one; comments on concept formation.
Comments on AH's chemical results and on an apparently anomalous sample of common salt being sent by JH; sends AH £5 for the month.
Comments on a number of chemical phenomena, and asks AH to analyze several solid samples; further, JH discusses meteor falls, with emphasis on the application of Newton's laws and terminal velocities.
Thanks AH for the chemical analyses [see JH's 1862-2-13]; gives fatherly advice about spending, or not spending, money.
Is giving advice about AH's application for a position at the University of Glasgow, and indicating what kind of help JH can provide.
Comments on some papers of JD relating to the theory of rain.
Quotes report of limitations in JW's new artillery shell for penetrating ironclad vessels. Recounts JH's [Apr. 1836] experiments at Cape of Good Hope to increase explosive power of gunpowder by adding [Luke] Howard's fulminating mercury.
Comments on HW's The Earth and Its Mechanism. HW erred by taking at face value François Arago's 'enormous blunder' of proving rotation from diurnal aberration.
Notes ingenuity of JB's gravimetric balance. Astonished that it did not occur to anyone before. [Letter continues 5 Feb.:] Suggestion for improving torsion thread arrangement.