Safford, William EK. ‘An Aztee nareotic’’ Journ. Hered., vol. 
VI, no. 7, Washington, D.C., July, 1915. 
Safford, William E. ““Narcotie plants and stimulants of the 
ancient Americans’” Ann. Rept. Smithson. Inst. for 1916, 
Washington, D.C., 1917. 
Safford, William EK. ‘‘Daturas of the Old World and New: an 
account of their narcotic properties and their use in oracular 
and initiatory ceremonies’? Ann. Rept. Smithson, Inst. for 
1920, Washington, D.C., 1922. 
Sahagun, Bernardino ‘‘Historia general de las cosas de Nueva 
Kspafia’’ ed. Carlos Maria de Bustamente, Mexico, 1829-30. 
Santesson,C.G.  ‘‘Notiz tiber Piule, eine mexikanische Rausch- 
droge’’ Ethnolog. Stud., vol. 1V, Gothenburg, 1937. 
Schultes, Richard Evans “*Peyote and plants used in the peyote 
ceremony’’ Bot. Mus. Leafl., Harvard Univ., vol. IV, no. 
8, Cambridge, April 12, 1937. 
Schultes, Richard Evans “Peyote (Lophophora Williamsii 
(Lem.) Coulter) and its uses’? Thesis, Harvard University, 
Cambridge, June 1937. 
Schultz, Ellen D. and Runyon, Robert  ‘“Texas cacti’? Proc. 
Tex. Acad. Sci., vol. XIV, 1930. 
Serna, Jacintode la ‘*Manual de los ministros para el cono- 
cimiento de sus idolatrias y extirpacion de ellas’’ Doc. inéd. 
p. Hist. EKspafia, vol. CIV, Madrid, 1892. 
Siméon, Remi ‘‘Dictionnaire de la langue nahuatl’’ 1885. 
Spinden, Herbert J. “*Thank the American Indian’’ Sci.Am., 
April, 1928. 
Tschireh, A. and Stock, Erich ‘‘Die Harze’’ vol. I,pt. 2, pp. 
1618-1634, Berlin, 1937. 
Urbina, Manuel ‘“‘El peyote y el ololiuqui’’ Anal. Mus. Nac. 
Mex., vol. VII, Mexico, 1900. 
van Rijn, J.J.L. and Dieterle, Hugo ‘‘Die Glykoside’’ ed. 2, 
Berlin, 1931. 
Winterstein, E. and Trier, Georg ‘‘Die Alkaloide: eine Mon- 
ographie der niturlichen Basen’’ ed. 2, pts. 1 and 2 Berlin 
1928-31, 
[88 ] 
