234 GOLDFISH VARIETIES Al^^D 



permanent position is to melt by alcohol blow-torch some chips of gum 

 shellac. This melting is done in the aquarium directly around the tube 

 and is continued until a small mound is formed. A piece of wet cardboard 

 will protect nearby glass from the heat. Gum shellac has perfect 

 resistance to water. It will adhere to almost anything and is of especial 

 value in connecting glass to metal. When cool it is quite hard. 



