manganese or with a combination of 0.5 per cent. lead and 0.02 per cent. manganese.
Until more definite results have been obtained with the tungates, which will probably prove of exceptional interest as driers, the above driers will probably be used to the greatest extent.
An Enormous Anchor. (La Nature, No. I948 , I3o.)--In the Engineering and Machinery Exhibition opened in September at Olympia in London, there is to be seen an enormous ship's anchor which was forged by N. Hingley and Sons, of Dudley, for the " Olympic," the new giant White Star steamer. It weighs 15 tons, is nearly 2o ft. long, and its greatest thickness is IO ft. The shank is 4 ft. 6 in. thick. It is furnished with a chain of three links each weighing 88o lbs. Twelve horses were required to drag it from Paddington to the exhibition. Another attraction is offered by Messrs. Siebe, Gorman & Co., in the demonstration of its new helmet which allows a man to plunge into water, or through flames or through noxious gases, with impunity. Men provided with this helmet walk at the bottom of a huge vat, filled with water, with glass sides, which allow their least motion to be seen clearly. Their only communication with the outside world is a telephone wire, through which they converse with the spectators.