536 



Philippine Journal of Science 



Fig. 1. o, paper clip as ordinarily employed ; b, paper clip with one end bent over so it will 

 paBB easily over the surface of the slide ; c, illustrating? the method of applying the label to the 

 slide; d, labeled Blides 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. 



