Naturalisation in Extra-Tropical Countries. 191 



too distant from a market, and not otherwise readily utilised. In 

 South-Europe the E. globulus has withstood a temperature of 19 F., 

 but succumbed at 17 F. ; it perished from frost at the Black Sea and 

 Turkestan, when young, according to Dr. Regel. Survived severe 

 winters in mild sheltered places of Cornwall and Dorsetshire, also 

 near Hastings [J. Colebrook]. According to the Rev. D. Lands- 

 borough, it proved hardy in the Isle of Arran. Mr. Ch. Traill notes 

 it as thriving amazingly as far south as Stewart-Island. Yet 

 the sirocco does not destroy it. In Jamaica it attained 60 feet in 

 seven years, on the hills ; in California it grew 60 feet in eleven 

 years ; in Florida 40 feet in four years, with a stem of 1 foot in 

 diameter. In some parts of India its growth has been even more rapid; 

 at the Neilgherry-Hills it has been reared advantageously, where 

 E. marginata, E. obliqua, E. robusta and E. calophylla had failed. 

 Its growth was there found to be four times as fast as that of teak r 

 and the wood proved for many purposes as valuable. Trees attained 

 a height of 30 feet in four years ; one tree, twelve years old, was 100 

 feet high, and 6 feet in girth at 3 feet from the ground ; to thrive 

 well there it wants an elevation of not less than 4,000 feet. It has 

 succeeded particularly well at an elevation of from 2,500 to 7,000 

 feet in Central Mexico [Dr. Mariano Barcena], Up to 1894 between 

 six and seven million trees were planted in the Transvaal, chiefly E. 

 globulus. Near Pretoria Mr. Schierholz noticed this species to have 

 attained a stem-circumference of 9J feet in 22 years. On the Upper 

 Shire-River, within British Nyassa-land, some of these trees have 

 already attained a height of over 100 feet. Ripens germinable seeds 

 in Jersey, where in 1891 already a tree had attained a height of 110 

 feet, with a stem-circumference of 10 feet at the base [T. Shannon]. 

 Mr. T. Waugh observed in South-Island, .New Zealand, that plants, 

 raised from locally-ripened seeds, proved hardier than those raised 

 from Australian ordinary seed. The province of Roussillon, after 

 its thousands of years of history, became in the aspect of its landscape 

 completely changed within tlie last few years through Prof. Naudin 

 extending thereto also copiously E. globulus. At the height of 2,500 

 feet on the base of the South-European Alps and in localities too 

 cold for olive-culture, E. globulus grew to 70 feet high in seven 

 years [Naudin]. In Algeria and Portugal it has furnished railway- 

 sleepers in eight years, and telegraph-poles in ten years [Cruikshank]. 

 At Urana it grew 15 feet in two years, with irrigation [E. Van 

 Weenan]. On the mountains at Guatemala it attained, in twelve 

 years, a height of 120 feet and a stern-circumference of 9 feet 

 [Boucard]. Will grow in favorable places on somewhat humid soil 

 slightly over a foot a month at Port Phillip while young. The form 

 of its leaves is only changed in the third year. The removal of the 

 broad-leaved lower branches from plants two or three years old 

 promotes much a healthy growth of the young trees. For window- 

 culture in cold countries E. globulus was first recommended by Ucke ; 

 for culture in hospital-wards, to counteract contagia, by Mosler and 

 Goeze. Eucalyptus leaves generate ozone largely for the purification 



