300 
A few years later, in the same journal, I added the following bibliographical 
notes : 
A paper by Gordon Sharp, " On our present knowledge of the Mydriatic Group," 
in Pharm. Journ. of 14th August, 1897, p. 161. 
Gregory, J Pituri and Tobacco. Brisbane, 1879, 8vo. Chiefly on Duboisia, 
Pituri and Anthocercis tasmanica. 
Ladenburg, A. Identity of Duboisine and Hyoscyamine. Ber. xiii, 357. Year 
Book Pharm., 1880, 26. 
Ladenburg, A. Identity of Daturine with Hyoscyamine and Duboisine. Ber. 
xiii, 380. Year Book of Pharm., 1880, 27. 
Ladenburg, A. The Mydriatic Alkaloids. Chem. Zeitung, 1881, No. 9. Year 
Book of Pharm., 1881, 20. 
Ueber Pseudhyoscyamin. Bin neue Alkaloid aus Duboisia myoporoides. Bericht, 
1892, p. 11. Pharm. Journ. (3), xxiii, 606. 
Merck, E. A new alkaloid, contained in Duboisia myoporoides R.Br., together 
with hyoscyamine and hyoscine. Arch. Pharm., 231, 117. Journ. Chem. Soc., Ixiv, 491. 
There is also a useful paper on " Duboisine and its uses in the Colonies " in the 
Pharm. Journ. of Australasia, May, 1891. Dr. Finselbach makes the statement that the 
leaves of D. myoporoides contain rather less alkaloid during the flowering period than 
later, and recommends them to be collected in November or December. 
****** 
More than twenty years later, Dr. J. M. Petrie took the matter up, and we have 
two valuable papers from his pen, vis. : ' The chemical investigation of some poisonous 
plants of the N.O. Solanacese;" Part IV, " The Chemistry of the Duboisias," (Proc. 
Linn. Soc. N.S.W., xiii, 118); and Part V, "The alkaloids of Duboisia Leichhardtii 
F.v.M.," (xiii, 137, 1917). 
The attention of my readers is invited to these two papers, which cannot be 
usefully briefly extracted. 
Leaves Poisonous to Stock. I think there can be no doubt of this, as 
suggested by Mueller many years ago. From time to time one hears of it as a suspected 
plant, but very rarely is evidence forthcoming. Mr. Blakely says that it is looked upon 
as poisonous in the Dungog district. 
Flowers. They are white, with parallel purplish stripes inside the corolla- 
tube (the lower part of the bell of the flower). The flowers are small, and not very 
conspicuous. 
Fruit. The tree bears a profusion of small black berries. 
Bark. Greyish superficially, but the mass of it of a yellowish or pale brown 
colour. Corky, soft to the touch, furrowed, thick, breaks off readily. The name 
Cork-tree is partly in allusion to the 'bark. I know of no use for it, except to a very 
limited extent for rustic work. 
