(1683) Observing this through a good microscope I saw that the greater part of the blood - globules had disappeared and that it seemed to me that they had split , each into six distinct globules .I then took about four parts of Sal volatile oleosum and one part of blood and put it as quickly as possible before my eyes through a good microscope , in order to observe the breaking up of the said blood - globules , some of which had so decreased in size in about 1 / 8 of a minute , that I could distinctly see the difference ; after 1 / 4 of a minute they had quite dissolved , so I lost sight of the globules before I was well aware of it .At one time I saw 20 blood - globules lying at some distance A and B add : still .