. Volume scientifico americano 05 numero 26 (dicembre 1861). Es, o sostanze che sono rese liquide per calore. In tali ritorte è stato consuetudine, e' generalmente molto desiderabile utilizzare una quantità di coke o altra sostanza in grumi per i due scopi di pre-senziare una grande superficie riscaldante per la decomposizione del liquido e di raccogliere le impurezze di carbonie residue che altrimenti si colerebbero e si colerebbero sul bottone della replica. Questo sostancerequies da cambiare di tanto in tanto per rimodellare il residuo del liquido, ed ha, finora, genero, se non sempre, stato
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. Scientific American Volume 05 Number 26 (December 1861) . es, or substances which are rendered liquidby heat. In such retorts it has been customary, andis generally very desirable to use a quantity of coke orother substance in lumps for the two purposes of pre-senting a large heating surface for the decompositionof the liquid and of collecting the residuary carbonand impurities which would otherwise cake and col- lect upon the botton of the retort. This substancerequires to be changed from time to time to removethe residuum of the liquid, and has, heretofore, gen-erally, if not always, been removed piece by piece orby shovelfuls at some inconvenience. The object ofthis invention is to remove the whole of the said sub-stance at once, and to this end it consists in what maybe called a coke box or coke basket attached to thecover of the retort for containing the said substance, the whole of which is thereby enabled to be removedat once by the simple act of taking off the cover ofthe retort. Invented and patented by A. K. Tupper, of Pontiac, Mich.. The new Patent Laws enacted by Congress on the 2dof March, 1861, are now in full force, andproveto be of great benefitto all parties who are concerned in new inventions. The duration of patents granted under the new act is prolonged toseventeen years, and the government fee required on filing an appli-cation tor a patent is reduced from S30 down to !§15. Other changesin the fees are also made as follows :— On filing each Caveat , $10 On tiling each application for a Patent, except for a design. ..$15 On issuing each original Patent $20 On appeal to Commissioner of Patents $20 On application for Re-issue $30 On application for Extension of Patent $50 On gran ting the Ex tension $60 On tilnig Disclaimer $10 On filing application for Design, three and a half years. ...$10 On filing application for Design, seven years $15 On tiling application for Design, fourteen years $30 The law abolishes discrimination in fees required of
