GUMS, RESINS, AND OTHER VEGETABLE EXUDATIONS. 189' 



from which it is precipitated by acids, and also in alcohol, but it 

 is nearly insoluble in ether. Contains at 100° C, on the average 

 6938% C, 8-85% H, and 21-77 O, corresponding to the formula 

 C 42 H 32 O 10 . A modern analysis is desirable. 

 Tasmania, Victoria and New South Wales. 



Proteace^e. 



It will be observed that this is one of the orders which yields 

 both gums and resins. 

 Banksia serrata, Linn, f., "Red Honey-suckle." 



A dark red gum (1 resin) has been observed on this species^ 

 See Maiden (42). "The Banksia wood, which produces large 

 quantities of resin." . . . (Note on the vegetation of W. A. 

 by A. H. Robertson, m.d.) in Prizi Essays Edinburgh Forestry 

 Exh. 1884. 



Grevillea robusta, A. Cunn., "Silky Oak." 



For an account of a gum and gum-resin from this well-known 

 tree see Maiden (42). Lauterer (33) also gives an account of this 

 resin. A research on the interesting exudation from this well- 

 known species is a desideratum. 



The substance was exhibited in the New South Wales Court,. 

 Paris Exhibition, 1867. In this connection see a paper, this 

 Journ. 1896, p. 194, by Mr. Smith on the sap of G. robusta. 



Following are some notes on the exudation by Mr. W. Bauerlen 

 who collected it for me on the Northern Rivers : — "When quite 

 fresh and soft it is of a peculiar yellow colour, but on hardening 

 it assumes something of a flesh or wine colour. It has an extremely 

 disagreeable smell. . . . The local opinion is that there is 

 more gum during very rainy weather than during drier times. 

 The country people look upon it as a nuisance as it sticks to the 

 horses' manes when they rub themselves against the tree." 



Grevillea striata, R. Br., "Beef wood." 



For an account of the gum-resin of this species see Maiden (42). 

 The Western (Q.) blacks make use of the resin of G. striata to 



