RECENT ADVANCES IN SCIENCE 197 



The Moon. — Russell, H. N., Fowler, M., Boston, M. C, 

 Fuller, E., Photographic Determinations of the Position of 

 the Moon, Harvard Annals, 80, No. 11. 



The Planets. — King, E. S., Eclipses of Jupiter's Satellites, 

 Harvard Annals, 80, No. 10. 



Lau, H. E., Beobachtungen des Planeten Jupiter, 8 

 Reihe, Ast. Nach., No. 4943, 191 8. 



Bolton, Scriven., The Surface Currents of Jupiter during 

 the Apparition of 191 7-1 8, M.N., R.A.S., 78, 467, 191 8. 



History. — Jeffreys, H., On the Early History of the 

 Solar System, M.N., R.A.S., 78, 424, 191 8. 



The Generalised Theory of Relativity. — Woolard, E., Gen- 

 eralised Relativity and Gravitation, Amer. Journ. Science, 

 45, 425, 191 8. This is a good elementary summary of the 

 subject. 



Lense, J., Uber Relativitatseinflusse in den Mondsystemen, 

 Ast. Nach. No. 4934, 191 8. 



Silberstein, L., Planetary Motion in Space-time of any 

 Constant Curvature according to the Generalised Principle of 

 Relativity, M.N., R.A.S., 78, 363, 191 8. Bizarre Conclusion 

 derived from Einstein's Gravitation Theory, M.N., R.A.S., 

 78, 465, 191 8. 



Variable and Binary Stars. — Eighth Report of the Section 

 for the Observation of Variable Stars, 19 10-14. Director, 

 C. L. Brook. Mems., B.A.A., vol. xxii. The volume contains 

 the observations of 29 stars by 34 observers with various 

 instruments from binoculars to a 12^-inch reflector. 



Bailey, S. I., Variable Stars in the Cluster Messier 5. Har- 

 vard Annals, 78, Pt. 2. Ninety-two variables were observed 

 and the elements of 72 are given. 



Harwood, Margaret, 7 Camelopardalis and r. r. Lyrse, 

 H.A., 84, No. 2. New light elements are derived. The former 

 is of interest because of its slowly decreasing period, the latter 

 because of its large range of variation. 



Chant, C. A., The Light Curve of W. Virginis, H.A. 80, 

 No. 12. 



Kron, E., Photometrische Beobachtungen von W. Ursse 

 Majoris, Ast. Nach. No. 4947, 191 8. 



Lunt, J., The Orbit of the Spectroscopic Binary, 42 Capri- 



