Page 12 Advertisements Column 2

Otago Daily Times, Issue 18954, 30 August 1923, Page 12

—Liquid air is so cold that ice is extremely “hot” compared with it, and a kettle filled with it will boil on a lump of ice! If some be poured into an open dish it looks as if it is being turned to steam, and quickly all disappears. It is much colder, as it were, than boiling water is hot, for water boils at 212 degrees F., but liquid air has a temperature of about—374 degrees F.—over 4CO degrees below freezing point! So not even a finger must be put in it, or severe frostbite will ensue. In preparing it ordinary air, at high pressure, is forced through a very small nozzle and is thus cooled. This cooled air is passed back over more incoming air, the latter is thereby cooled and then passed back as before. And so on till the air gets so cold that it condenses in drops, just as steam condenses to water when cooled. Many wonderful experiments can be performed with liquid air, Awing to its extreme coldness. A tube of milk placed in it becomes a solid block in a few seconds, and so does mercury. Grapes and flowers become hard, white, and brittle, so that they can easily bo broken into fragments with a hammer. A child’s indiarubber ball is hardened in the same way, the air inside contracts and almost a vacuum is made, so that when trying to bounce it against a wall it explodes like an electric lamp would. If one end of a cigarette be clipped in the liquid and then a lighted match applied it burns furiously like a squib; a cigar gives oven a better effect. A biscuit behaves similiarly, and cotton wool burns up instantly with a great flare. Liquid air evaporates into the atmosphere so quickly—about a pint an hour from a large jar—that it has to be kept in special vessels which are just like thermos flasks; an ordinary cork or glass stopper is no good, so cotton wool is used instead. A new and ignorant justice sat (writes the Manchester Guardian) at her first Licensing Committee, and rubbed bewildered eyes as she heard great names of history end literature. of kings and queens long dead, bellowed out in the court, to be answered by commonplace citizens in modern dress. Had she come by mistake to the undress rehearsal of a pageant or fancy dress ball? “Shakespeare,” thundered the court sergeant. “Shakespeare.” echoed the policeman to the outside corridors. “Sir Bichard Steele.” “Sir Richard Steele.” Other names followed; “Lord Nelson,” "The Duke of Wellington,” “The Marquis cf Oranbv.” “Prince Blucher.’’ “King Charles I,” "King William IV,” "Queen Victoria.” “The King of Bohemia. Later the bewildered justice learned what had already dawned on her mind—that all publicans were called for by the eigns of their houses, and not hy their names, so that all proceedings should be at once “understanded of the people,” and in the case of transfers of licenses any third person wishing to apply should know at onyo of the transaction. The youngest passenger yet carried on an acioplane from Brussels aerodrome made the •ourney to Amsterdam a week or two ago. She is Jacqueline Jungens, aged 3J. Her parents having urgent need to make the journey took with them their little girl, who went through the experience without the slightest uneasiness. livery factory and industrial concern where accidents arc liable to happen should keep a bottle of ‘OIL OF SALT” handy as a “first aid.” For lacerations, cuts, injuries. bruises, burns, etc., it relieves pain immediately and heals quickly. Leading industrial works in New Zealand' find it invaluable “OIL CF SALT,” 2s 6d per bottle, at all chemists. Wholesale, Ewing Commercial Agency.—Advt.