406 POST-MORTEM EXAMINATIONS 



Equally good but .much cheaper is Frost's mounting 

 solution : 



Potassium acetate 160 grammes. 



Sodium fluoride 80 grammes. 



Chloral hydi ate 80 grammes. 



Cane sugar (Tate's cubes) . . . . 3,500 grammes. 

 Saturated thymol water 8,000 c. c. 



6. After twenty-four hours in this solution, or as 

 soon as the tissue sinks, transfer to a museum jar, fill 

 with fresh mounting solution, and seal. 



6a. Or transfer to museum jar and fill with liquefied 

 gelatine, to which has been added i per cent, formalin. 

 Cover the jar and allow the gelatine to set. When 

 solid, seal the cover of the jar in place. 



7. To seal the museum preparation first warm the 

 glass plate which forms the cover. This is most 

 conveniently done by placing the cleaned and polished 

 cover-plate upon a piece of asbestos millboard over a 

 bunsen flame turned low. 



8. Smear an even layer of hot cement over the flange 

 of the jar. The cement is prepared as follows : 



Weigh out and mix in an iron ladle 



Gutta percha (pure) 4 parts. 



Asphaltum 5 parts. 



and melt together over a bunsen flame, stirring with an 

 iron rod until solution is complete. 



9. Invert the glass plate over the jar and press down 

 firmly into the cement. Place a piece of asbestos 

 board on the top and on that rest a suitable weight 

 until the cement is cold and has thoroughly set. 



10. Trim off any projecting pieces of cement with 

 an old knife, burr over the joint between jar and cover- 

 plate with a hot smooth piece of metal (e. g., the sear- 

 ing iron) . 



1 1 . Paint a narrow band of Japan black to finish off, 

 round the joint, overlapping on to the cover-plate. 



