Unable to avail himself of JH's invitation. Thanks for his interest in American astronomy. Met U. J. J. Leverrier, J. B. Biot, and others since he has been in Paris.
Unable to avail himself of JH's invitation. Thanks for his interest in American astronomy. Met U. J. J. Leverrier, J. B. Biot, and others since he has been in Paris.
Description of the recent total eclipse of the sun as seen at Pulkowa Observatory.
Forwarding account of the great comet of 1858. Regarding illustrations for astronomical monographs. Includes several publications of Harvard Observatory.
Sending through H. M. Parker proof of the engraving of the Nebula of Orion. Comments on this.
As he has been absent on the continent he has been unable to accept any of JH's kind invitations. His stay in Europe has been short, but full of gratification.
Sending back number of their 'Annals' to complete JH's set. Remarks on the parts already published.
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 Encloses list of unpublished nebulae found at Harvard over past 15 years.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.
Unpublished Harvard list contains nine nebulae published in [G. F. J. A.] Auwers's catalogue of novae, because those were first discovered at Harvard. Thanks JH for pointing out two others already published, which GB will exclude from list. Admits possibility of 'illusions' in some. Asks JH to compare results in C. F. Gauss's article on achromatic object glass. Sent copy of T. H. Safford's article on companion of Sirius.