418 THE FUTURE OF ARID LANDS 
agencies and industries interested in the product to be obtained. 
Without such a concentrated effort in which scientists of several 
disciplines cooperate, many potentially useful arid land plants (1, 
3, 6) will not become crops or even be extensively utilized. 
REFERENCES 
1. Chandler, Clyde, 1954. Improvement of plantago for mucilage pro- 
duction and growth in the United States. Contribs. Boyce Thompson 
Inst. 11(8), 495-505. 
2. Daugherty, P. M., ef a/. 1953. Industrial Raw Materials of Plant 
Origin: III. Survey of candelilla and candelilla wax. Bull. Eng. Expt. 
Sta. Georgia Inst. Technol. 16. 
3. Daugherty, P. M., et a/. 1953. Industrial Raw Materials of Plant 
Origin: IV. A Survey of Simmondsia chinensis (Jojoba). Bull. Eng. 
Expt. Sta. Georgia Inst. Technol. 17. 
4. Duisberg, Peter C. 1953. Chemical components of useful or potentially 
useful desert plants of North America and the industries derived from 
them. Desert Research, Proc. of the International Symposium held in 
Jerusalem, May 7-14, 1952. 
5. Krochmal, A., et a/. 1954. Useful native plants in the American south- 
western deserts. Econ. Botany 1 (8), 3-20. 
6. Rogers, J. S., and L. M. Pultz. 1952. Canaigre: A possible domestic 
source of vegetable tannin. Shoe and Leather Reptr. Dec. 27, 1952. 
7. Tysdal, H. M., and R. D. Rands. 1953. Breeding for disease resistance 
and higher rubber yield in Hevea, Guayule, and Kok-Saghyz. Agron. 
¥. 45 (6), 234-242. 
