Scientific.

Waikato Times, Volume XXVI, Issue 2164, 22 May 1886, Page 2 (Supplement)

Scientific.

— \ PfiAN kor Renokrivq Paper as Tough as Lkvthbr.— lr. I'OL'nistH in mixin* chloride ot zinc with the pulp in the ■■i>iir»t> of m'ti'nfoctare, It his been found th.it th*> irr afc.'<- the di-jfwe of concentration of the 21110 solution, the srreiiter will hf th- tnu.hnfss of the paper. Ir. can b« nei for makinsr l)"xe^ combs, for rooting, -md iv bootmaking. ,| — ELECTRIC ROAI> RuLLKKS. — Mr E. QelleratV electric, »oad mUm- i- again exditing attention. It is drivi't) by two dynamos, aud ateered b\ another dynamo. About 100 Hccunoalatoix are used, d\u] the grotw weight of the m.uibine is 18 tons, About 13 hone -power is developort altogether. —How to Core. Freckles — M. Hilkin, in the Anualen do U Societo MedicoChirurcrioale de Liege, recommends the .following process for our in £ freckles: — After the skin han been well washed and diied, the folds of the Hkin are drawn out with the left hand, and, with the light carbolic acid ia painted on the ppreckle and allowed to dry. During *omo day* the apots appear mure evident than before the application of the acid, and a kind of epidermic scale iv formed. In ceren or oiirht days the ooale falls off. The nkin thus exposed is of a rose colour, but afterwards becomes white. -—A New Mkthod for Preparing Liquid Carbonic Acid.— A patent has been recently taken out in Germany for the above object. Sodium bisulphate in solution in a leaden jar receives an equivalent part of some carbonate suspended in water. The mixture is stirred, and carbouic acid is given off, and led over a drying mixture into a gasometer, where it is condensed into a liquid. The liijuid carbonic acid can thus be very cheaply introduced, and is applicable to a variety of purposes. About 500 litres of the gas, at ordinary pressure, can be supplied for one mark. At this price, it will pay mineral water manufacturers to buy gas ready made. By evaporation of the liquid acid, so much hent is absorbed that it can be used for the manufacture of ice. The patentee proposes to pass the <j^bonic acid thus uti- | lized over moist-fsodium bicarbonate, I which is thus coverted into bicarbonate, from which liquid carbonic acid is again prepared. — Mineral Oils in India.— The earth oil industry in Burmah does not fulfil the sang oine expectations that was at one time formed of it. The greatest operations have been undertaken by the Boronga Company, on the Boronga Islands, of Akvab, and on the Bamree Island of the Ryookpyoo District. Last year the company sank eight new wells, but the whole amount of crude oil pumped up waa only 234,0Q0 gaUout, (md

the refined oil was selling at Vs. a case in Kyookpy^o, while America:) pitroleum was quoted at 10s fi.l a t\w.> in Calcutta. Two other companies also started during thoyenr ; one was fairly «uco:s.sfitl : the holfl* bored by the other .ill t'irned dry. In fact, no oil-bearing stratum has bfun discovered in Bnnnnh fip»al to the American or Caspian tn U\*, and the natives appiMr to work what tlicie ar« i more profitably tlun Europeans. In '\s«am, the Assam liailtoidt ami Ti-ad-ing C'Hnp.iny has a cnnct\>»ion for work inn tho oil-ljud at M.iktim. but aa yet it has taken no adxant'ini 1 of it