140 naturalists' assistant. 



absolute alcohol; then placed the tissues in i per. cent solution of picro- 

 carminate from four to twelve hours. They were next shaken in dis- 

 tilled water to remove the picric acid and placed in glycerine and water 

 which is gradually replaced by pure glycerine containing i per cent, 

 of formic acid. By this proces the nuclei are stained bright red, the 

 rest of the cell being uncolored. 



Goadby's sohition for preserving specimens. 

 No. I. Bay salt 4 oz. 



Alum 2 oz. 



Corrosive sublimate 2 grs. 

 Rain water i qt. 



No. 2. Salt. 4 lb. 



White arsenic 20 grs. 



Corrosive sublimate 2 grs. 

 Boiling rain-water i qt. 

 Arsenical soap. 



BECCEURS. 



Camphor 5 oz. 



White arsenic 2 lbs. 



White soap. 2 lbs. 



Salts of tartar 12 oz. 



Powdered chalk 4 oz. 



The soap is melted with a little wafer over the fire, and the chalk and 

 tartar added. It is then removed from the fire and the arsenic, and 

 lastly the camphor mixed with a little alcohol is stirred in. The paste 

 is then packed in jars and labelled. 



This composition is formed in cakes like ordinary soap. 



