ASTRONOMY. C5 



Hartford, Conn. : Private Observatory of D. TV. Edgecomb, Esq. 



The report made last year and. printed in the Annual Record of 

 Science and Industry for 1877 will serve equally well for this year. 

 There have been no changes, either in equipment or work. 



Hastings, N. Y. : Private Observatory of Henry Draper, Esq. 



In answer to your circular, heads 3, 4, 5, 1 have to say that the sub- 

 jects of observation of the past year have been principally of a spec- 

 troscopic and photographic kind, comprising a series of observations 

 of the transit of Mercury on May 6, 1878, in which I had the valu- 

 able assistance of Professor E. S. Holden, of the Naval Observa- 

 tory, Washington ; and an expedition to observe the eclipse of the 

 sun on the Rocky Mountains, July 29, 1878, in which I had the as- 

 sistance of Professors George F. Barker and Henry Morton, and Mr. 

 Edison. 



The Transit-of-Mercury observations will be printed in the " Report 

 of the Naval Observatory." The results of the eclipse expedition are 

 printed in the American Journal of Science and in Nature. 



It is intended to prosecute the research connected with my dis- 

 covery of oxygen in the sun as the main work for the coming year. 



Haverford, Pa. : Observatory of Haverford CoUege. 



Professor S. Alsop, Jun. , Director. 



In answer to the inquiries of your circular, I send the following : 



1st. Samuel Alsop, Jun., Director. 



2d. Equatorial, 8^ inches aperture, 11 feet focal length. Meridian 

 Circle, 4 inches aperture, 5 feet focal length. Prime Vertical Transit, 

 2 inches aperture. Bond's Magnetic Register. Two Sidereal Clocks. 



3d and 4th. The observatory is principally for the use of students, 

 and the adjustments of the instruments and observations for time 

 comprise nearly all that has been done of late. 



5th. No publications. 



Jackson, Mich. : Private Observatory of 0. Mulvey, Esq. 



My astronomical instruments are very few and simple, and the 

 work done by them by no means great. 



The instruments consist of: 1. A small Refracting Telescope, 3 inch- 

 es clear aperture, of good defining qualities (with a variety of Eye- 

 pieces varying from 30 to 200 diameters), mounted equatorially. 2. A 

 Chronometer. 3. I am also constructing a Clock with a gravity es- 

 capement, intended for a good time-keeper. 



The recorded work done in 1877 and 1878 consists of a few rough 

 sketches of the dark markings and polar spot visible on Mars when 



