Whitehaven Gazette Oct. 18, 1819 Scientific Notices

Scientific Notices

Whitehaven Gazette - Oct. 18, 1819

SCIENTIFIC NOTICES. ****** TANNING OF LEATHER.        It appears by the experiments of Mr. MARTIN, (an eminent farmer) instituted on a large scale, for the express purpose of estimating the relative value  of the bark of larch (larix pyramidalis) to that of the oak, that the results were as follows:        1st, that the equal weights and qualities of skins prepared in precisely similar methods by means of oak and larch bark - the larch tanned specimens were found to be specifically heavier than those prepared by the oak bark. 2nd,  the colour of the larch - tanned leather  is a light fawn, while that of the oak tanned is of a deep brown. 3rd, that in respect of durability the great test of the utility of the leather specimens of both kinds were submitted to actual experiment in shoe soles and found to be equally lasting. ****** POTASH IN SEA WATER. Dr. WOLLASTON has recently ascertained the existence of potash in sea water; he estimates the proportion of this alkali, which he supposes to exist in the state of sulphate, at something less than one 2000th part of the water at its average density. ****** NEW VEGETABLE ALKALI.        In analyzing the seeds of the Delphinitin Staphysagria, M. LASSAIGNE and FENEUELLE have discovered a new alkali combined with Malte Acid. It is a very fine white chrystalline powder without smell, and appearing brilliant in the sun - they propose to call it delphine. ******

 

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