IX 
C O N T E N T S. 
XXVII. Experiments and Obfervations upon a blue 
Subfiance , found in a Peat-mofs in Scotland : By 
Sylvefter Douglas, Efq-, p. 1 8 1 . 
XXVIII. Two Medical Obfervations by Dr. Jofeph 
Benevuti, Pbyjician at Lucca ; communicated to the 
late Prefident of the Royal Society , by Dr. Ch. Al- 
lioni, of Turin, F.R.S. and tranjlated from the 
Latin by Daniel Peter Layard, M. D. Phyfician to 
her Royal Highnefs the Princefs Dowager of Wale?, 
Member of the Royal College of Phyficians in Lon- 
don, and of the Royal Societies of London and 
Gottingen. p. 189. 
XXIX. An Account of a particular Species of Cameleon : 
By James Parlons, M. D. F. R. S. p. 192. 
XXX. A Letter from J. A. Rizzi Zannoni, Member 
of the Academy of Sciences at Gottingen, and Geo- 
grapher to his Sicilian Majefly , to the late Earl of 
Morton, Pr. R S. containing feveral Agronomical 
Obfervations , made in feveral Parts of the Kingdom 
of Naples and Sicily ; tranfiated from the French, 
by Mathew Maty, M. D. Sec. R. * S’. p. 196. 
XXXI. An Account of fame Experiment s, by Mr, 
Miller of Cambridge, on the [owing of Wheat : By 
W. Watfon, M. D. F. R. S. p. 203. 
XXXII. Of the Theory of circulating Decimal Frac- 
tions : By John Robertfon, Lib. R. S. p. 207. 
XXXIII. A Letter from Mr. J. R. Former, F. A. S. 
to M. Maty, M. D. Sec. R. S. containing Jome Ac- 
count of anew Map of the River Volga. p. 214. 
XXXIV. An Account of the Lymphatic Syfiem in Birds , 
by Mr. William Hewfon, Reader in Anatomy : In 
a Letter to William Hunter, M. D. ■ F. R. S. and 
by him communicated to the Society. p. 217. 
Vol. LVIIL b XXXV. A 
