270 



Modern Microscopy 



arranged satisfactorily (the manceuvring must be done as 

 quickly as possible), place the basin immediately in a 

 vessel of cold water, in which it will readily float. Never 



Fig. 75. — Paeaffin Cooled Slowly. ( x 75 Diameters.) 

 Dark spaces, air cavities. 



by any means put the basin below the surface of the water, 

 or disaster will result by the formation of water-containing 

 cavities in the wax. 



Fie. 76.- — Embedded Object Fixed on, "Wooden Cube. 



Cooling Paraffin. — In warm weather it is an excellent 

 practice to float the embedding basin in such a vessel as a 

 photographic developing dish, through which a stream of 

 water from the tap is led by a rubber tube ; or iced water 



