MOSQUITO TOBACCO of China are pastilles made of. the sawdust of juniper and other resinous woods. The mixture is of juniper or pine-tree sawings (pih heang fun or sung shoo), artemisia leaves reduced to powder (nai - hai), tobacco leaves (can fun), a small portion of arsenic (pe-za), and a mineral called nu-wang. To thirty pounds of the pine orjuniper sawings, about twenty of artemisia, five of tobacco, and a small quantity of arsenic were added. Each article was well beaten up with water, then the whole mixed together, and in the form of a thick paste rolled on a slip of bamboo, and dried. The sticks are somewhat like the common joss-sticks of the country, or about the thickness and length of a light walking-cane. Another substance is in long narrow bags of paper, —say half an inch in diameter, and two feet long,—which are filled with the following substances, namely, the sawings of pine or juniper mixed with a small portion of nu-wang and arsenic. The proportions are thirty
pounds of sawings, two ounces of nu-wang, and one ounce of arsenic. This mixture is not made up in the form of a paste like the latter, but simply well mixed, and then run into the bags in a dry state. Each bag being filled, is closed at the mouth, and then coiled up like a rope, and fastened in this position with a bit of thread. Various species of wormwood are likewise em ployed for the same purpose. The stems and leaves of these plants are twisted and dried, and probably dipped in some preparation to make them burn. The mosquito has a mortal aversion to all these substances, and wherever they are burning, there the little tormentors will not come.