PERFUMES: THEIR SOURCE AND EXTRACTION. 



131 



EXFLEURAGE (CoLD). 



The second process with which we have to deal is, perhaps, that of 

 the greatest interest. I have ah'eady divided flowers into two classes 



and referred to the fact that those of the second class emit a perfume 

 continuously for a long time after they have been plucked. It is for 

 these flowers that this process is employed. 



The process consists in spreading upon glass trays framed with 

 wood about three' inches deep a layer of specially prepared fat about 



