ESSAY 
ON THE 
PHYSIOGNOMY OE SERPENTS. 
BY 
H. SCHLEeEL, 
DOCTOR IN PHILOSOPHY, CONSERVATOR OF THE MUSEUM OF THE NETHER- 
LANDS, MEMBER OF SEVERAL LEARNED SOCIETIES. 
TRANSLATED BY 
THOS. STEWART TRAILL, M.D., F. 
REGIUS PROFESSOR OF MEDICAL JURTSPRUDENCE IN THE UNIVERSITY 
EDINBURGH, &C. &C. 
EDINBURGH: 
MACLACHLAN, STEWART, AND COMPANY. 
1843 
