ILLUSTRATIONS 



Plate 1 



. 1. Crystals of antimony salt with hexamethylenetetramine in hydro- 

 chloric acid solution. 



2. Crystals of bismuth salt with hexamethylenetetramine in hydro- 



chloric acid solution. 



3. Crystals of gold chloride with hexamethylenetetramine. 



4. Crystals of platinum chloride with hexamethylenetetramine. 



5. Crystals of the gold salt (fig. 3) and the platinum salt (fig. 4) 



formed with hexamethylenetetramine in a solution of gold and 

 platinum. 



6. Crystals of palladous chloride with hexamethylenetetramine. 



Plate 2 



7. Crystals of silv< 



8. Crystals of mer« 



chloric acid solution. 



9. Crystals of cadmium salt with hexamethylenetetramine and potas- 



sium iodide in hydrochloric acid solution. 



10. Crystals of magnesium salt with hexamethylenetetramine and po- 



tassium iodide in hydrochloric acid solution. 



11. Crystals of manganous salt with hexamethylenetetramine in hydro- 



chloric acid solution. 



12. Crystals formed from a mixture of hydrochloric acid, potassium 



iodide, and hexamethylenetetramine. 



