REVIEWS

Books reviewed in this article: The Biochemistry of the Carotenoids , Volume 1, Plants. By T. W. G oodwin Nitrogen Assimilation of Plants. Ed. by E. J. H ewitt and C. V. C utting Microclimate Measurements for Ecologists. By D. M. U nwin The Experimental Biology of Ferns. Ed. by A. F. D yer Structure and Bonding. Volume 40. By I. A. C ohen , L. Q ue J r , H. U mezawa , T. T akita and W. R üudiger . Ed. by J. D. D unitz , J. B. G oodenough , P. H emmerich , J. A. I bers , C. K. J orgensen , J. B. N eilands , D. R einen and R. J. P. W illiams Indole and Biogenetically Related Alkaloids. Ed. by J. D. P hillipson and M. H. Z enk Three Dimensional Structure of Wood. An Ultrastructural Approach. By B. G. B utterfield and B. A. M eylen The Euphorbiaceae of New Guinea. By H. K. A iry S haw