Reports witnessing a lunar rainbow, including a secondary rainbow.
Reports witnessing a lunar rainbow, including a secondary rainbow.
Provides a rule for dividing vanishing lines in perspective drawing. [Written by 'Geometer', i.e., JH.]
Comments on a philosophical paper by [Robert Leslie] Ellis, sent him by WW. Discusses his own and Ellis's views on physical causality.
Would like to hear how the Admiralty Manual is progressing.
Thanks for letter. Is grateful for all the trouble JH is taking over the Admiralty Manual. Presumes JH has dealt with rotatory storms; otherwise he would have asked Col. William Reid to write a few pages.
No summary available.
No summary available. This letter was started on the 9th November but was not completed and sent until the 18 November 1848
No summary available.
No summary available.