Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . f Von Juette and de Ponteves, takenfrom the press and placed in large tubs which are lined with enough is adcled to cover the pomace, and a little over. Addfirst, 2 kilogrammes ( pounds) of concentrated sulphuric acid toevery hectolitre ( gallons) of water. Now let hot steam passthrough a pipe into the pomace, and let it slowly cook for three or fourhours. In the reaction which follows, the lime takes up the sulphuricacid and the tartaric acid is set free. Boil
Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . f Von Juette and de Ponteves, takenfrom the press and placed in large tubs which are lined with enough is adcled to cover the pomace, and a little over. Addfirst, 2 kilogrammes ( pounds) of concentrated sulphuric acid toevery hectolitre ( gallons) of water. Now let hot steam passthrough a pipe into the pomace, and let it slowly cook for three or fourhours. In the reaction which follows, the lime takes up the sulphuricacid and the tartaric acid is set free. Boiling the pomace in the sul-phuric acid does not affect its value for later operations, and, as a matterof fact, some of the cellulose is converted into grape sugar, increasing, ifanything, the quantity of grape spirit which may be obtained liquor in the tubs which contains most of the free tartaric acid isdrained from the pomace and the pomace itself is thoroughly liquor then goes into other tubs lined with sheet-lead. A stirringdevice is placed within and has to be covered with lead. gig 1. ?^/^mw////,//// / ////My/^/z^/w/ Fig. 1 shows a tub with such an attachment, which is worked Ijyhand, and which can be detached at any time. In large establishmentsthis is worked by steam power. After the liquor has been poured intothe tub, lime water is added as long as the liquid shows an acid reaction,meanwhile agitating by means of the stirrers. Blue litmus paper is thebest means of testing the state of the liquid. When lime water is addedthe tartrate of lime is formed, and as soon as the stirring is done it set-tles to the bottom of the tub. This has afterwards to be thoroughlycleansed with clear Avater. The lime tartrate can then be sold as suchor worked over again. Should sulphate of magnesia be present in anyquantity, it may prevent the lime salt from precipitating this case you will have to pour from four to five parts of water on thepomace and ad
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Keywords: ., bookcentury1800, bookdecade1850, bookidappendixtojo, bookyear1853
