66 The Preparation of Microscope Slides 



tions. They are not, however, so convenient as the conventional stender 

 dish (Fig. 76), which is furnished with a round, ground-on cover. If this 

 cover is touched with a little petrolatum, it is possible to keep alcohol 

 for several days in the dish without loss. When an object has to be 



Fig. 72. Pipette. 



Fig. 73. Section lifter. 



Fig. 74. Syracuse watch 

 glass. 



Fig. 75. Embryological 

 watch glass. 



Fig. 76. Stender dish. 



Fig. 77. Screw-cap vial. 



stored for any length of time in a fluid, it is much better to use a vial 

 (Fig. 77), the type shown having a screw cap of plastic. These are more 

 expensive than the old-fashioned corked vials but they are so much 

 better that they are worth the additional expense. They should be avail- 

 able to the mounter in a great variety of sizes. Where a number of very 

 small objects is to be stored, it is convenient to place each object in a little 

 vial plugged with cotton and then to accumulate these vials in a larger 



