PLATE II. 



7. Calcium phosphate, crystallized and amorphous forms, 



both colorless. 



8. Triple phosphate, "coffin-lid" crystals, colorless. 

 Sodium urate, brown spherical masses with spicules. 

 Bacteria. 



9. Ammonium urate, "thorn-apple" forms, color brown. 

 Calcium carbonate, spherules and dumb-bell forms, 



colorless. 



10. Calcium oxalate, "dumb-bell" and "envelope- shape" 



crystals, colorless. 



11. Uric acid crystals, yellow to dark brown. 

 Amorphous urates, brownish. 



12. o, Calcium sulphate crystals, colorless. 

 6, Impure leucin, nearly colorless. 



c, Tyrosin, colorless when pure. 



