There is a grass that can scratch steel

Horsetail wintering having unusual stiffness, increases in suburban forests. Its dark green, quite unbranched stems sticking out of the earth, even the most severe winters safely tolerate frost. Silica is very solid, accumulating in the outer walls of plant cells, a lot of horsetail in all varieties, but it is particularly rich horsetail hibernating. It was his green stem is quite possible to leave scratches on the steel surface. And by the way, our ancestors knew about the features of this herb, often used powder obtained from the ashes of horsetail, polishing wood and metal.





via factroom.ru