same level, stratum or feature would substantiate iden- 
tification of coprolites. 
This procedure was developed in the Ethnobotanical Labo- 
ratory of the Botanical Museum of Harvard University with the 
support and encouragement of Prof. Richard Evans Schultes, 
Director of the Museum. I thank Prof. Schultes and the 
museum staff for their contribution to this project. I also ex- 
press my appreciation to Miss Virginia Popper for initially 
suggesting to me the application of chemical techniques to 
ethnobotanical and archaeological identifications. 
No 
i) 
So 
