ACKNOWLEDGEMENTS 
To the Brazilian Institute of Forest Development for 
permitting the work to be done; to Professor Sylvio Pellico 
Neto and the School of Forestry at the Federal University of 
Parana for providing the facilities; to the Brazilian 
Institute of Space Research at $80 Jose do Campos for 
providing the analytical facilities on the G.E 100 Image 
Analyser. We would also like to acknowledge the help given 
by the Royal Botanic Gardens, Kew and Dr. Peter Gasson for 
preparing the slides of Araucaria leaves and to Susan 
Thompson and David Boothroyd for their help. 
The slide of the leaf of Araucaria Angustifolia is 
reproduced by permission of the Controller of Her Majesty's 
Stationary Office and the Director of the Royal Botanic 
Gardens, Kew.