Describes JH's theodolite by G. F. Reichenbach and offers to loan it for PB's survey [of Sinai Peninsula].
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Describes JH's theodolite by G. F. Reichenbach and offers to loan it for PB's survey [of Sinai Peninsula].
Discusses WM's reply regarding commercial weight of new Standard Pound.
'Not Sent.' Clarifies values quoted in JH's letter of 5 Nov. to RS.
Clarifies information in postscript of JH's letter of 5 Nov. to RS.
Measurements by A. T. Kupffer afford greater accuracy for [specific] gravity of water than values used by Henry Kater as quoted in postscript of JH's 5 Nov. [1867] letter to [WM].
Deals with several problems related to several papers.
Is still trying to bring the various definitions of the pound into agreement [see GA's 1867-11-30]; the question of weighing in air or vacuum remains as a problem.
Having helped to create confusion surrounding the pound weight [see GA's 1867-12-3], JH now understands it simply and clearly; JH wonders if he is 'growing elderly.'
Comments on reports of meteor sightings from the United States and Italy; explains why one may see a satellite of Jupiter where there is none.