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botanists was not equal to the task of determining Mr. Christie’s specimens, which 
were mostly Eucalypts, and it is not possible in all cases now to determine the 
species referred to in the paper. 
3. M. Naudin has briefly touched upon Eucalyjhus and geological formations, 
as regards Erance, in his 1st Mem. (Eucalyptus), p. 361, L883, and his second Mem., 
p. 5, 1891. 
4. In a brief paper by me, “ Notes on the Geographical Distribution of some 
New South Wales plants ”(Proc. Linn. Soc. N.S.TF., xiv, 107 [1889]), will be 
found some reference to plants and geological formations in the South Coast district 
of this State. 
5. In the Bendigo district for many years, and to a limited extent at present, 
it was considered by the miners that the Victorian Ironbark, Eucalyptus leucoxylon 
(should be sideroxylon. —J.I1.M.) was a direct indication that the country on which 
it grew was auriferous, and that only therein would payable reefs be found. There 
is a good deal of truth in the statement, yet it cannot lie considered as invariably 
true, as payable reefs have been found, and are being worked, where the Ironbark 
never grew. 
*Erom very early times it has been noticed that the soil overlying mineral 
veins is favoured by special vegetation; and though the occurrence of such 
vegetation cannot be taken as an infallible indication of the existence of such veins, 
it Avill be interesting to record the results of past observations, so that they may 
serve for a guidance to further observation in future. 
Iron .—A vein of iron ore near Siegen, Germany, can be traced for nearly 
2 miles by birch trees growing on its outcrops; while the remainder of the country 
is covered with oak and beech. 
Lead .— The lead plant (Amorpha canescens) is said by prospectors in 
Michigan, Wisconsin, and Illinois, to be most abundant in soils overlying the 
irregular deposits of galena in limestone. It is a shrub 1 to 3 feet high, covered 
with hoary down; the light blue flowers are borne on long spikes, and the leaves are 
arranged in close pairs on stems being almost devoid of footstalks. Gum trees, or 
trees with dead tops, as also sumac and sassafras, are observed in Missouri to be 
abundant where float galena is found in clays. 
Limestone .—The beech tree is almost invariably prevalent on limestone, and 
detached groups of beech trees have led to discoveries of unsuspected beds of 
limestone. 
Phosphate .—The phosphate miners in Estremadura, Spain, find that the 
Convolvulus althceoides —a creeping plant with bell-shaped flowers—is a most reliable 
guide to the scattered and hidden deposits of phosphorite occurring along the contact 
of the Silurian slate and Devonian dolomite. 
* Lock’s Miner's Pocket Book. 
