318 MISCELLA\^EOUS. 



cipitate falls clown by the addition of the solution, 

 suffer the whole to stand undisturbed till it has 

 all subsided, and then pour off the clear fluid. 

 Make this precipitate into a paste with charcoal 

 finely pounded, and dry it in an earthen pan gra- 

 dually. Then put the mass into an iron or 

 earthen retort, and distil it. The phosphorus 

 will come over, and may be collected under 

 water. 



To make Canton\s Phosphortts. 



Take some oyster-shells ; calcine them, by 

 keeping them in a good fire for about an hour. 

 Select out of the calcined shells the purest and 

 whitest parts, and pound and sift them. To 

 three parts of this lime add one of flowers of 

 sulphur ; mix tliem well together, and put them, 

 well pressed, into a crucible. Place it in a good 

 fire, where it must be kept red hot for an hour 

 at least ; it may then be taken out to cool. AVhen 

 it is cold, break the mass to pieces, and select out 

 of it the brightest part, which will shine in the 

 dark. 



A beautiful representation of the telescopic 

 appearance of one of the planets may be made 

 by means of this. Cut out in paper the shape of 

 the planet, such as a half moon, Saturn and his 

 ring, &c., and cover it over with strong gum water; 

 then strew some of this phosphorus, finely pow- 

 dered, over the surface. When you Y/ant to 

 exhibit it in the dark, you must previously expose 

 it for a few minutes to the light of an Argand's 

 lamp ; or, what is better, make the flash from the 

 discharge of a large electrical jar, or battery, pass 

 over its surface, and it immediately becomes 



