Observations of eclipses of the satellites of jupiter, made at Washington, during the opposition of 1875–1876

✍ Scribed by D. P. Todd

• Publisher: John Wiley and Sons
• Year: 1878
• Tongue: English
• Weight: 202 KB
• Volume: 92
• Category: Article
• ISSN: 0004-6337
• DOI: 10.1002/asna.18780920303

✦ Synopsis

Focal length 390 inches.

(2) Two of the 6 inch Transit-of-Venus Equatorials, the apertures of which were generally reduced to 4 inches.

These instruments have a focal lengtli of 72 inches.

(3) The observation of 1876, February 2 was made with the 4 inch comet-seeker of the Observatory. Focal length 32 inches.