Green wich, England

Royal Observatory. Long. from Washington 5h. 8m. 12.04s. E., lat. 51°28′ 38.4" N. Directors: J. Flamsteed 1675, E. Halley 1720, J. Bradley 1742, N. Bli 1762, N. Maskelyne 1765, J. Pond 1811, G. B. Airy 1835, W. H. M. Chris ployed on the same equatorial mounting. With these instruments Huggins has conducted his well-known spectroscopic researches. Meudon, France. Long. from Green wich Oh. 8m. 55.6s. E., lat. 48° 48′ 18" N. Director, J. Jan en. Devoted to astronomical physics, especially to photography. It contains, among other powerful instruments, a reflector of one meter aperture.