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). 



