. The Cuba review. 14 THE CUBA REVIEW or to l)rigliti'n the tints {livon hy some other iiifiri'dicnt, or fo cfTcct tlic former :is ;i jjrcparative to tlic latter. It is estcoined \or\ hif^hly, ln'caiiso it atTortis tlu- most (lural)lt' (Ich']) ri'il and black dyes. The peculiar coloring jiriiiciplc called haomatoxyliii iCliiHHOC)) forms an orange red solution with boiling water, becoming yellow as it cools, but recovering its formi>r hue when heated. Alkali converts it first to purjile, then to violet, and lastly to l)rown, in which case it seems to be decomposed. Metallic oxide unites with
. The Cuba review. 14 THE CUBA REVIEW or to l)rigliti'n the tints {livon hy some other iiifiri'dicnt, or fo cfTcct tlic former :is ;i jjrcparative to tlic latter. It is estcoined \or\ hif^hly, ln'caiiso it atTortis tlu- most (lural)lt' (Ich']) ri'il and black dyes. The peculiar coloring jiriiiciplc called haomatoxyliii iCliiHHOC)) forms an orange red solution with boiling water, becoming yellow as it cools, but recovering its formi>r hue when heated. Alkali converts it first to purjile, then to violet, and lastly to l)rown, in which case it seems to be decomposed. Metallic oxide unites with it, forming blue compounds. Gela- tine throws down reddish floccidi. Stannous chloride renders it lilac. Logwood shavings yield their color to water and alcohol; the latter extracts it more readily than water. The color of its dyes is red, inclining to violet or purjile. Its aciueous decoction, left to , becomes yellowish, and at length black. Acids turn it yellow; alkalies deepen its color and give it a purple hue. The pro]ier shades ami colors are obtained by the use of alumi- nous mordants. A blue color may be obtained from it by the addition of verdigris, but the great consumption of logwood is for blacks, which are obtained by alum and iron bases, and of any requisite degree of intensity. Alcohol extracts most of the active principles of this wood and forrrs a deep colored tincture. .... Logwood Sticks on the Dock Ready for Export. Logwood was first shipi)ed to England and used for dyeing purposes soon after the sion of Queen Elizabeth, but the imskilled dyers of her time found that it yielded a fugitive color, and so in b581 a law was passed prohibiting the importation and use of logwood in Eng- land. Its use continued, however, on the continent and the German chemists soon discovered a method for making a fast dye from logwood extract. Logwood then came into the English markets under some feigned names until the law prohibiting its importation was repeale
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