y8 LABORATORY BACTERIOLOGY 



by the edge with a pair of dissecting forceps. Place a drop of 

 blood with the platinum loop on the cover-glass near the for- 

 ceps. Take a thick, square cover-glass by the edge, rest it on 

 the first above the drop of blood, hold it at an angle of about 

 20° from it and draw it down over the first, thus spreading the 

 blood in a very thin even film over the surface. If the film is 

 thick, the preparation should be rejected and another one made. 



