Chapter ^ 



Paraffin Method 



Sectioning 



The embedded blocks (Fig. 9) are trimmed into squares or rectangles, 

 depending on the shape of the tissue, with two edges parallel (Fig. 10). 

 The two short or side edges need not be parallel, sometimes with ad- 

 vantage as will be indicated later. W^ooden blocks or metal object discs, 

 such as are sold by supply houses [Lipshaw #800), are covered ^vith a 

 layer of paraffin. (Suggestion: Keep a I -inch brush in a beaker of melted 

 paraffin in the paraffin oven.) Then a heated instrument (spatula or 



Figure 9. Untriuimed paraffin 

 block. 



tissue Figure 10. Trimmed paraffin 

 tissue blocks. 



51 



