SUCCINIC ACID. 167 



acid, filter, concentrate to a syrup at 100 C., and set 

 aside to crystallise. 



2. Sarkosine is very soluble in water, nearly insolu- 

 ble in alcohol, and insoluble in ether. Notice neutral 

 reaction to litmus of aqueous solution. 



3. Add to an aqueous solution cupric acetate : an 

 intense blue colour will be produced. By evaporation 

 dark blue crystals of a double salt may be obtained. 



4. In a cold saturated solution of mercuric chloride 

 place a crystal of sarkosine : the liquid will gradually 

 solidify to a network of white needles. 



5. To a solution of sarkosine sulphate add lead 

 peroxyde ; decomposition with, effervescence will take 

 place, and the solution will contain metJiylamine. 



6. Dissolve sarkosine in hydrochloric acid, add 

 platinic chloride, and set aside to evaporate. Yellow 

 octahedra of a platinum salt, 2 (C 3 H 7 N0 2 , HC1) Pt01 4 , 

 2H 3 0, losing water at 100, will be deposited. 



7. Heat sarkosine in a tube ; it will melt and sub- 

 lime without residue. 



8. Heat another portion with soda-lime : methyl- 

 amine (with a smell of ammonia and alkaline reaction) 

 will be evolved. 



Succinic acid, C 4 H 6 4 . 1. Obtain from the fluid in 

 the bladders of echinococci by evaporating to a syrup, 

 adding hydrochloric acid and extracting with ether. 

 The ether solution after distillation leaves succinic 

 acid in crystals. 



2. Heat in a tube open at both ends. The acid will 

 sublime in silky needles. 



