PLATE 83 
SOLITARY CRYSTALS 
1. Cactus grandiflorus (Cerdus grandiflorus [L.], Britton and Rose). 
2. Hemlock bark (Tsuga canadensis [L.], Carr.). 
3. Krameria root (Krameria triandra, Ruiz and Pav.). 
4. Soapbark (Quillaja saponaria, Molina), 
