104 Modern Microscopy. 



of the cover. Give the slide a good wash in water, and 

 place it in some methylated spirit, which will remove the 

 water. Dry with a clean soft cloth, and apply a coat 

 of Miller's cement or Club Black enamel, and when this 

 has dried add another. 



Farrant's Medium. Allow the slide to dry for a few 

 days, then put it into a saucer of water and wash away 

 the excess of medium with a soft brush. Drain off as 

 much water as possible, and, if the cover is firm enough, 

 dry the slide carefully with a soft cloth ; if not, allow all 

 the moisture to evaporate by exposure to the air. When 

 quite dry, put it in a turn-table and apply a coat of 

 cement, and when this has dried add" another. 



Dry Mounts do not require any washing, but they 

 should have one or two coats of any good cement. 



Asphalt and white zinc cement may be used for balsam 

 mounts, but they are no good for glycerine jelly or 

 Farrant's medium. The best cement for all slides is Club 

 Black enamel. It can be bought at any cycle shop. As 

 sold, it is a little too thin for microscopical work, but if the 

 cork is left out of the bottle it will soon evaporate to the 

 desired thickness. When too thick, dilute with methylated 

 spirit. The brush must also be washed in methylated 

 spirit after use. 



THE END. 



London: Bailliere, Tindail and Cox, King William Street, Charing Cross. 



