Sorry to hear of CD’s poor health.
Sorry to hear of CD’s poor health.
Returns Gray’s review [of paper on mimetic analogy, Am. J. Sci. 2d ser. 36 (1863): 285–90]
and expresses his sorrow over CD’s health.
Much obliged for his letters regarding the amalgam of iron. Cannot account for his ignorance of JH's Bakerian lecture.
Read of JH's intention to prepare general catalogue of nebulae. Encloses list of unpublished nebulae found at Harvard over past 15 years. Finds similarity in form but difference in theory between JH's equations for curve of object glasses ['On Aberrations of Compound Lenses and Object Glasses' (1821)] and those of K. A. Steinheil and C. F. Gauss. Asks about Josef Fraunhofer's theory.
Regarding the 'willow leaves' seen by James Nasmyth on the surface of the sun.
No summary available.