Natural Philosophy. 



Chapter IX. — Huxley on the Laws of Motion — Present Position of the Question. 

 Pubhslied February 1, 1881, in the Buenos Ayres Herald. 



Chapter X. — Oceanic Circulation — Present Position of the Question. 

 Published November 8, 1881, in the Buenos Ayres Herald. 



Chapter XL — Copernicus versus The Royal Astronomical Society — The Theory 

 of the Moon's Motion. 



Articles reprinted from the Buenos Ayres Herald of September 4, 1880, and 

 from the Buenos Ayres Standa/rd of August 22 and November 19, 1880. 



Chapter XII. — The Elements of Astronomy. 



An Essay read before the English Literary Society on August 20, 1879, in 

 illustration of Tlie Old and the Nem Befiiiitions of Vis-Inertice. 



Chapter XIII. — The Secular Acceleration of the Moon's Motion. 



Published in Buenos Ayres, April 1879, and Dedicated to William Spottis- 

 woode, Esq., President of the Royal Society, as a Challenge on behalf of the 

 New Elements of Natural Philosoph3^ 



Chapter XIV.— The Theory of the Tides. 



A Paper rejected by the Royal Society in February 1868. 



Chapter XV.— The Circulating Action of Gravitation in the Ocean and the 

 Atmosphere. 



A Paper rejected by the Royal Geographical Society in 1876. 



Chapter XVI. — Defence of Vis-Inertife. 



And Answer to the President of the Argentine Scientific Society ; published 

 in Buenos Ayres, September 19, 1879. 



Chapter XVII. — Dr. Siemens on Solar Heat — Present Position of the Question. 

 Published April 30 and May 11, 1882, in the Buenos Ayres Herald. 



Chapter XVIIL— Scientific Honour. 



Articles published in the Buenos Ayres Herald, December 10, 1880, and 

 January 8, 1881, and dedicated to the editor of the Ediniwrgh Review. 



Chapter XIX. — Is Force Inherent in Matter ? 



Published in the Buenos Ayres Herald, September 22, 1881. 



Chapter XX. — The Nebular Hypothesis, modified by the Discoveries of the 

 ■ Action of Astral Gravitation, and the Revolving Force of Gravitation. 



Articles published in the Buenos Ayres Standard, on September 2, 15, 

 and 16, 1880. 



Chapter XXI. — Amenities of Science. 



1. The Tone of Science. 



Published in the Buenos Ayres Standard on December 7 and 13, 1878. 



2. The Buard of Trade on Oceanic Circulation. 

 Published in the Buenos Ayres Standard on December 28, 1878. 



