TABLE OF CONTENTS. 



5fr 



PREFACE Page (i) 



GENERAL SUMMARY OF PROGRESS xix 



A. MATHEMATICS AND ASTRONOMY (xix) 1 



(a.) MATHEMATICS. 



Pure Mathematics : Problem of Three Bodies, 1 ; Computation of Abso- 

 lute Perturbations, 2 ; the Spirals of the Nautilus, 1. Applied Mathe- 

 matics : Morphology in Architecture, 5 ; the Integrometer, 6. Weights 

 and Measures : Length of Egyptian Cubit, 2 ; Metrological Relations of 

 the Great Pyramid, 4 ; Testing Weights in England, 5. 



(b.) ASTRONOMY. 



The Nebulae : Movements of, 8 ; Changes in Nebula around Eta Argus, 

 41. The Stars: Stellar Parallaxes, 6 ; Gilliss' Southern Zone of Stars, 8; 

 The Double Star Procyon, 9 ; Spectrum of the Milky Way, 9 ; Scintilla- 

 tion of the Stars, 10. The Sun : Apparent Diameter, 18, 22 ; Constitution 

 of, 17,44; Temperature of, 19; the Photosphere, Langley on, 11; Metallic 

 Elements in Sun's Atmosphere, 45 ; Young's Theory of the Sun's Crust, 38; 

 Sim Spots, 14, 16, 43; Changes in, 15; Sun Spots and Solar Refraction, 15; 

 Sun Spots and Faculae, 44 ; Sun Spots and Terrestrial Meteorology, 79, 80 ; 

 Sun Spots and Rain, 79 ; Solar Radiation, 19 ; Solar Spectrum : Draper's 

 Photographs, 13 ; Observation of, from Balloon, 41 : Effect of Temperature 

 on Apparatus for Observing, 14; Solar Parallax, 16 ; Influence of Sun on 

 Atmospheric Pressure, 118; Eclipse of 1870 in Italy, 20; of 1874, 40. The 

 Planets: Rotation of, 26; Uranus: Satellites of, 43 ; Jupiter: Satellites 

 of, 24 ; Atmosphere of, 39 ; Venus : Visibility of Dark Half of, 39 ; liars : 

 Flattening of, 42. The Moon: Defects "in the Lunar Tables, 27; New- 

 comb's Tables, 26 ; Considered as a World, 25 ; Apparent Diameter of, 27 ; 

 Influence on the Weather, 69. Meteoroids : Explosion of a Meteor, 28; 

 Orbit of a Bright Meteor, 42. Comets: Constitution of, 28; Determining 

 Parabolic Orbits of, 29. The Aurora : Origin of, 29 ; Observation of, 30 ; 

 Nature of, 31. The Zodiacal Light : Polarization of, 32. Observatories 



* In the arrangement of articles in the body of the Record, it was found impracti- 

 cable to place them in proper systematic sequence, especially as many belonged as 

 much to one division as to another, sometimes even to three or four equally. The 

 present systematic Table is intended to remedy the difficulty, by bringing together in 

 proper order all the titles of articles, and, by a system of cross references and dupli- 

 cations, to point out all matter relating to any one subject, whatever be its situation 

 in the volume. The references in Roman letters preceding the page references of 

 the headings relate to the pages of the introductory "Summary." 



