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torics to produce gas for this: purpose. Another mctliod of firing which is rcceiying attention is that adoptcd in thc Brunlcr intcrna1:combustion boiler, in whicli tlic fuel is burncd undcr the surface of tlic ivatcr, tlic products of conibustion passing over with tlic stcani generated. For this type of boilcr a very liigli efficiency is clainicd. Articles on tho stcaiu accumulator, an importtint adjunct for boilcr plants in clicmicnl industry, have also appcarctl in the tcclinical prcss during tlic year. Important cstcnsions arc being made a t various gns works ancl collicrics, in some cases with tlic objcct of producing sinoltclcss fuel, and in otlicrs simply with n r i c w to incrcasing thc cnpcity of thc works for gas production.
Tlic lcssons iinprcsscd on tlic world by tlic sliortngc of nitrntcs during the war liarc rcsultctl in consitlerable attention being clircctcd townrds nitrogcn fisn- tion, and dcvclopmcnts hare taken placc in this provincc during tlic ycar. At Uilliiighnni-on-Tees tlic Syntlictic Aiuiiionia and Nitratcs, Ltd. , hnvc st:ui-ted up tlicir ncw factory, which is the only plant outside of Gcrmiiny in wliicli the Habcr process has, so far, bccn worl;cd with succcss. Xearly all the great countrics in Europc and Noitli America linve becn tlcrcloping nitrogcn fisntion during tlic year. J n Italy, for csamplc, plants arc being designed, or nrc in COUTSC of crcction, which wi11 raise tlic annual production to 20, OOO tons of fiscd nitrogcn in the forin of ammonium sulphatc, an amount which is morc than double the internal coiisuniption of that country. Tlic Casalc process, using liydrogcn produced by Fauser clcctrolyscrs, sccnis to be the favouritc inctliod adopted in Italy, nlthough some pIants nrc being erected in which the Claude process will bc used.