96 H. STOLTERFOTH ON A SIMI'LE METHOD OF CLEANING DIATOMS. 



mud in suspension, and is a very useful means of getting rid of 

 what is often a great trouble. 



The advantages of this process are — 



1st. Its great simplicity. 



2nd. No danger from acids or alkalies. 



3rd. The removal of mud and broken particles. 



In deposits, however, in which there is much organic matter, we 

 must still have recourse to acids or fire to destroy this, but the 

 result will be improved by afterwards boiling in soap and water. I 

 have also boiled fresh gatherings in soap and water, and then burnt 

 on platinum-foil with good success, much of the flocculent matter 

 being removed. 



