536 
Philippine Journal of Science 
Fig. 1. a, paper clip as ordinarily employed ; b , paper clip with one end bent over so it will 
pass easily over the surface of the slide ; c, illustrating the method of applying the label to the 
slide; d, labeled slides in Coplin’s staining jar. 
easily read through the loop of the clip. The slides may then be 
stacked in the Coplin’s staining jars, as illustrated in fig. 1, d, 
and manipulated in the usual manner. The margin of paper 
folded over the edge of the slide is so narrow that it will not 
become stained in the solutions and the slides may be washed 
in running water without risk of losing the labels. Slight pres- 
sure with the laboratory towel will remove any drops of water 
that may adhere to the clip and label after such an operation. 
When treatment of the preparation is completed, the clip may 
be detached, the paper torn across the sharp margin of the slide 
and the numbered end permanently attached to the slide with 
gum or paste. When the preparation is finally discarded the label 
comes off in the cleaning process and the slide is left without 
blemish. The clips do not interfere either with the proper 
stacking of the slides in the grooves of the staining jar or with 
the placing of the cover. 
I have employed this method in making hundreds of prepara- 
tions by the usual “wet” methods and have, so far, found no 
drawbacks to it. The clips are so cheap that when they become 
rusty, as they do in the course of time, they may be thrown 
away without any qualms of conscience. 
In conclusion I desire to express my thanks to Miss Antonina 
Haughwout who drew the figures that accompany this note. 
