150     One-third of one hundred grains sugar of milk is put in a glazed porcelain mortar, the bottom dulled previously by rubbing it with fine, moist sand. Upon this powder is put one grain of the powdered drug to be triturated (one drop of quicksilver, petroleum, etc.). The sugar of milk used for dynamization must be of that special pure quality that is crystallized on strings and comes to us in the shape of long bars. For a moment the medicines and powder are mixed with a porcelain spatula and triturated rather strongly, six to seven minutes, with the pestle rubbed dull, then the mass is scraped from the bottom of the mortar and from the pestle for three to four minutes, in order to make it homogeneous. This is followed by triturating it in the same way 6-7 minutes without adding anything more and again scraping 3-4 minutes from what adhered to the mortar and pestle. The second third of the sugar of milk is now added, mixed with the spatula and again triturated 6-7 minutes, followed by the scraping for 3-4 minutes and trituration without further addition for 6-7 minutes. The last third of sugar of milk is then added, mixed with the spatula and triturated as before 6-7 minutes with most careful scraping together. The powder thus prepared is put in a vial, well corked, protected from direct sunlight to which the name of the substance and the designation of the first product marked 1/100 is given. In order to raise this product to 1/10000, one grain of the powdered 1/100 is mixed with the third part of 100 grains of powdered sugar of milk and then proceed as before, but every third must be carefully triturated twice thoroughly each time for 6-7 minutes and scraped together 3-4 minutes before the second and last third of sugar of milk is added. After each third, the same procedure is taken. When all is finished, the powder is put in a well corked vial and labelled 1/10000, i.e., (I), each grain containing 1/1,000,000 the original substance. Accordingly, such a trituration of the three degrees requires six times six to seven minutes for triturating and six times 3-4 minutes for scraping, thus one hour for every degree. After one hour such trituration of the first degree, each grain will contain 1/100; of the second 1/10,000; and in the third 1/1,000,000 of the drug used.* Mortar, pestle and spatula must be cleaned well before they are used for another medicine. Washed first with warm water and dried, both mortar and pestle, as well as spatula are then put in a kettle of boiling water for half an hour. Precaution might be used to such an extent as to put these utensils on a coal fire exposed to a glowing heat.