117 
4. M. Berthelot. " Sur quelques matieres sucrees." Compt. Rend, xli, 392 
(1855). Examination of an Australian manna received from the Paris Exhibition of 
1855. The author examines the Melitose of Johnston (see p. 42), and from it obtains 
an unfermentable sugar called Eucalin (Eucalyne). 
The manna examined by Berthelot was probably that exhibited by Mrs. (after- 
. wards Lady) John Hay, then of Welaregong, Upper Murray, at the Paris Exhibition 
of 1855, obtained from Eucalyptus rubida. 
" Sur quelques matieres sucrees." N. Ann. Chim. Phys. (3), 46, 66. A copy of 
the preceding. 
" Ueber einige zuckerartige Substanzen." Journ. fur prakt. Chem., 67, 230. 
A translation of the preceding. See also Chem. Centr., 1855, 69. Chem. Organ., Paris, 
1860. Deals with Melitose at ii, 260, and Eucalin at ii, 250. 
Thus Berthelot found the same crystalline sugar (that Thomson and Johnston 
had found), and called it Melitose. Eucalyn (Eucalin) is a saccharine amorphous body 
obtained by fermenting Melitose with yeast. There is a brief abstract of Berthelot's 
work in Passmore. 
5. Then we come to a paper by Rischbieth and Tollens (Berichte d. deutsch. chem. 
Ges., xviii, 2611, 1885), who established the identity of the sugar contained in the 
manna from E. viminalis with the Raffinose or " plus sugar " of molasses, and tlie 
" Gossypose " of cotton seeds. The further history of Melitose is that of Raffinose 
(see Passmore). 
6. Scheibler (Berichte, 3566) proposes to rename Melitose Melitriose to bring 
it into conformity with the newer nomenclature of sugars, and Passmore appears to 
adopt this name. 
7. F. W. Passmore. ' The Carbohydrates of Manna from Eucalyptus Gunnii 
Hook, and of Eucalyptus honey." Pharm. Journ. (3), xxi, 717 (1891). 
He worked at E. rubida, then looked upon as a variety of E. Gunnii. The paper 
is an admirable one, and I have freely referred to it. 
8. H. G. Smith. " On the saccharine and astringent exudations of the Grey 
Gum (Eucalyptus punctata DC.) (Proc. Roy. Soc. N.S.W., xxxi, 177 (1897). ) 
The material came from Belmore, near Sydney. The trees had been wounded 
by the larvae of an insect [? of a beetle. J.H.M.] and a considerable amount of manna 
had run down the trunks. More or less impure, therefore, were the saccharine and 
astringent exudations since they commingled somewhat. 
Mr. Smith (p. 179) makes the interesting observation that there is no record of 
manna being obtained from the Renantherse, it appearing that only Eucalypts whose 
kinos contain eudesmin or aromadendrin can produce manna. 
He finds the manna of E. punctata to largely consist of Raffinose (Melitose). 
