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By means of improved machinery and of ingenious devices for shielding the substance operated on from the accession of heat, to which reference will be made more in detail presently, Professor Dewar was able to liquefy the gas fluorine, recently isolated by Moussan, and the recently discovered gas helium in 1897.
As has been said, it was by adopting this principle of self-intensive refrigeration that Professor Dewar was able to liquefy hydrogen. More recently the same result has been attained through use of the same principle by Professor Ramsay and Dr. Travers at University College, London, who are to be credited also with first publishing a detailed account of the various stages of the process.
There were at that time, according to rumour, no fewer than four yachts in the Pacific; but it was strange that any two of them should thus lie side by side in that outlandish inlet: stranger still that in the owner of the Nyanza, Captain Dewar, I should find a man of the same country and the same county with myself, and one whom I had seen walking as a boy on the shores of the Alpes Maritimes.
This question has been settled by Professor Dewar, at the Royal Institution, London, by placing the radium in a medium next to the coldest that art has yet produced liquid air. The latter is surrounded by the only yet colder medium, liquid hydrogen, so that no heat can reach it.
God the Sovereign and Judge, God the Creator, without whom nothing was made that is made, is God the Saviour, Immanuel, the Lamb slain from the foundation of the world. There seemed truly nothing of man's making between us and the living God; a realisation of being God's creatures, God's redeemed children, formed for Himself, for His own glory. Mr. Dewar preached the action-sermon, after which Mr.
Even as to the facts themselves different experimenters have differed somewhat, but the final conclusion of Professor Dewar is that, after a period of fluctuation, the power of a magnet repeatedly subjected to a liquid-air bath becomes permanently increased. Various substances not markedly magnetic at ordinary temperatures become so when cooled.
Dewar were a perfectly happy and united couple. Dewar had been last seen alive about ten o'clock on the Saturday night getting off a car near his home. At eleven a neighbour had noticed a light in the Dewars' house. About five o'clock on the Sunday morning another neighbour had been aroused from his sleep by the sound as of something falling heavily. It was a wild and boisterous night.
These are often, if not usually, made by accident, and by a man on the track of something else, on the elucidation of which he is probably so intent that he cannot spare time for side-issues, very likely never even thinks of them. Sir James Dewar discovered the principle of the "Thermos flask" whilst he was working at the exceedingly difficult subject of the liquefaction of air.
It is in England, thanks to the skill of Sir James Dewar and his pupils thanks also, it must be said, to the generosity of the Royal Institution, which has devoted considerable sums to these costly experiments that the most numerous and systematic researches have been effected on the production of intense cold.
It so happened that at the time Mr Mackay was in charge of the Rajkumar College, a large number of important Chiefs were minors, including the Rajah of Rutlam, the junior Chief of Dewar, the Nawab of Jaora, and the two sons of His Highness the Maharaja Holkar. At present there are no Chiefs of the first rank in the Residency College.
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