No summary available.
Showing 1–7 of 7 items
No summary available.
Writes to FM to show several ways in which a series of prisms may be used in a spectroscope to have the light exiting in the same line as it entered the spectroscope. [Appends 4 pages of diagrams.]
Is sending manuscript with comments. Congratulates her 'activity of mind.' Critiqued her paper according to the effect it will have when published. Working on catalogue of nebulae.
Has spent much time on figures and annotations for JH's nebula catalogue [see GA's 1863-6-5]; JH needs information from a paper in GA's hands.
Was surprised at the large vote in support of a parliamentary bill to abolish the British Standard of weights and measures; JH hopes bill will not pass.
Agrees that the weather is hot. The word theodolite. Where did he obtain his verses by Walter Mapes? Why not come and visit them?
Comments on zero and observational errors when using a telescope, and adds some comments about family relationships and JH's nebula catalogue. [Part of this letter is indecipherable.]