Smithsonian Report, 1923. — Miser and Ross 



Plate 3 



I. Diamonds Are Being Mined at the Arkansas Mine by Means of a 

 Powerful Jet of Water and Then Carried Through a Sluice to 

 the Plant Pictured Below 



2. Diamond Plant at the Arkansas Mine 



Here the sluiced material is sized and jigged. Then the concentrates, after being placed on 

 smooth sheets of metal, are carefully searched for stones 



