Ink, Horticultural

Prep. Chloride of platinum, 1 ⁄ 4 oz.; soft water, 1 pint; di olve, and preserve it in gla . Used with a clean quill to write on zinc labels. It almost immediately turns black, and cannot be removed by washing. The addition of gum and lampblack, as recommended in certain books, is unnece ary, and even prejudicial to the quality of the ink. 2. Verdigris and sal ammoniac, of each 1 ⁄ 2 oz.; levigated lampblack, 1 ⁄ 2 oz.; common vinegar, 1 ⁄ 4 pint; mix thoroughly. Used as the last, for either zinc, iron, or steel. 3. Blue vitriol, 1 oz.; sal ammoniac, 1 ⁄ 2 oz. (both in powder); vinegar, 1 ⁄ 4 pint; di olve. A little lampblack, or vermilion, may be added, but it is not nece ary. As No. 1; for iron, tin, or steel plate. Some of the preparations described below under ‘ Incorrodible ink ’ are also used by gardeners and nurserymen.