I 



how strikingly every investigation tends to develope more and more their 

 importance and their extreme attraction as an object of study. A few 

 years ago magnetism was to us an occult power affecting only a few bodies ; 

 now it is found to influence all bodies, and to possess the most intimate 

 relations with electricity, heat, chemical action, light, crystallization, and, 

 through it, with the forces concerned in cohesion ; and we may, in the 

 present state of things, well feel urged to continue in our labours, en- 

 couraged by the hope of bringing it into a bond of union with gravity 

 itself." 



He gave three Friday discourses on the Diamagnetic Condition of Flame 

 and Gases ; on two recent inventions of Artificial Stone ; and on the Con- 

 version of Diamond into Coke by the Electric Flame. 



He was made Foreign Honorary Member (one of eight) of the Imperial 

 Academy of Sciences, Vienna, and Doctor of Liberal Arts and Philosophy 

 in the University of Prague. 



Mt. 57 (1849). 



He gave two Friday discourses, one on Phicker's repulsion of the Optic 

 Axes of Crystals by the Magnetic Poles ; and the other on De la Rue's 

 Envelope Machinery. 



He reported to the Trinity House on the ventilation of Flambro' Head, 

 Dungeness, Needles, and Portland Lighthouses. 



He was made Honorary Member, First Class, Institute Roy ale des Pays- 

 Bas, and Foreign Correspondent of the Institute, Madrid. 



Mt. 58 (1850). 



The twenty -third series of Researches in Electricity appeared, on the Polar 

 or other Condition of Diamagnetic Bodies. The twenty-fourth series was 

 the Bakerian lecture, on the possible relation of Gravity to Electricity. He 

 finishes this paper, saying, " Here end my trials for the present. The 

 results are negative ; they do not shake my strong feeling of the exist- 

 ence of a relation between gravity and electricity, though they give no 

 proof that such a relation exists." The twenty-fifth series was on the 

 Magnetic and Diamagnetic Condition of Bodies: — 1. Non-expansion of 

 Gaseous Bodies by Magnetic Force. 2. Differential Magnetic Action. 3. 

 Magnetic characters of Oxygen, Nitrogen, and Space. The twenty- sixth 

 series was on Magnetic Conducting-power : — 1 . Magnetic Conduction. 2. 

 Conduction Polarity. 3. Magnecrystallic Conduction. Atmospheric Mag- 

 netism : — 1. General principles. The twenty-seventh series was on Atmo- 

 spheric Magnetism (continued) : — 2. Experimental inquiry into the Laws 

 of Atmospheric Magnetic Action, and their application to particular cases. 



He gave a Friday discourse on the Electricity of the Air, and another 

 on certain conditions of Freezing "Water. 



He reported on the adulteration of whitelead for the Trinity House. 



To Prof. Schonbein he writes : — " By-the-by, I have been working with 

 the oxygen of the air also. You remember that three years ago I dis- 



