(1685) Experiments with sal volatile oleosum .§ § 13 Because such a great deal of fuss has been made of sal volatile oleosum I have ordered a small bottle of it to be purchased from an apothecary who boasts of making the same absolutely according to the invention of the late Mister Silvius .It had a yellow colour ; and when I had brought the same before my eyes in the open air , I frequently noticed with astonishment how a large quantity of oil , which was among this sal volatile oleosum , separated from the other liquid ; and this in a very large number of roundish particles , some of which no bigger than the globules of our blood , floating in a thin , watery fluid , just as if we saw fat particles floating in hot broth , and all having a yellow colour , so that is was only the oil that gave the yellow colour to the sal volatile oleosum .