THE FLORAL WORLD AND GARDEN GUIDE. 95, 
with it will commence on the Ist of May. The secretary of the exhibition is M. 
Lubbers, Jardin Botanique, Brussels; the secretary to the congress is Professor E. 
Morren, Liége. 
Cuiantuvs Dampieni, Deutsch Flagge or German Flag, was, says the Ham- 
burgher Gartenzeitung, raised by L. Vieweg, of Wegleben, near Quedlinburg, from 
seed; and he has now, after three years’ trial, found it to be constant from seed, 
Instead of the scarlet with a black centre of the typical C. Dampieri, this variety 
‘represents the German national colours—black, white, and red. The upper part of 
the flower is of a fiery scarlet, the centre is a glossy, deep, bluish-black, and the 
keel is pure white, with a sharply-detined red margin on the lower side. The sepa- 
rate flowers measure 34 inches and upwards in length, and are borne in clusters of 
four to seven together. In habit it agrees exactly with the ordinary C. Dampieri, 
and it is an exceedingly free bloomer. Treated as an annual it is most effective. 
Tue PURPLE-LEAVED Pracu is well figured in Illustration Hurticole, t. 224. 
The leaves are less purple when the fruit is ripe than in the spring and early 
summer, when the growth is as yet immature ; but as here represented they are still 
distinctly coloured a fine bronzy purple on the under side, and purplish green above. 
The fruit is of medium size, spherical, with distinct suture, the colour delicate rosy 
carmine, with shades and patches of yellowish buff. 
Lire History or tue Porato Funcus.—At the last monthly council meeting of 
the Royal Agricultural Society of England, Mr. Whitehead, Chairman of the Bo- 
tanical Committee, reported that the report of Professor De Bary had been received, 
and will be published in the next number of the Society’s Journal. This is described 
as a most valuable and exhaustive report, giving a complete history of the Potato 
Fungus and of its allies, with a critical examination of the observations and opinions 
of Mr. Worthington G. Smith. The series of experiments which has been carried 
on during the last two years by Professor De Bary at the instigation of the Society 
are fully recorded, with their bearings on the cultivation of the potato. The result 
of his experiments and observations establishes that the disease persists ina dormant 
state during the winter in the potato tubers; and that the spores for the propa- 
gation of the disease have been produced by the mycelium growing in the potato 
plants produced from such tubers. 
Lemons and CiTrons.—The Greek island of Andros, it is said, produces from 
10,000,000 to 15,000,000 lemons annually. They are chiefly exported to Constan- 
tinople, the Black Sea, and the Danube, realizing the average price of from £1 to 
£1 3s. per thousand. Large quantities of citrons also are produced in the Island of 
Naxos, and exported to England, Austria, and Turkey. In Zea quantities of 
Valonia are produced ; the quantity exported to England, Austria, Italy, Turkey, 
and Russia amounting to near upon 2000 tons—the average price obtained being 
from £17 to £21 per ton. 
TO CORRESPONDENTS. 
Propacatine Case.—J. R. N., Kingston.—The idea of the case is exceedingly 
good, but your design requires a few modifications, to insure its working in a 
thoroughly satisfactory manner. The case should be made of strong tin, and have 
a double bottom, to form a space for holding two inches of water. A water jacket 
round the sides and ends is quite unnecessary, as the warmth derived from the water 
in the space formed by the double bottom will be quite sufficient. A pipe about 
eight or ten inches in length, and inserted near one of the corners at the back, must 
be provided for filling the tank, boiler, water space, or whatever it may be desig-- 
nated, whenever required, and for emptying it a small tap must be fixed on the 
under side for drawing off the water. One of the smal] atmospheric burners will 
answer admirably for heating the water, and it will be found that very little gas 
will be required for maintaining the requisite degree of warmth. ‘The case can 
stand upon the legs, as you propose, and when fitted with a tank, according to the 
directions here given, it will have the appearance of the case shown in the sketch 
accompanying your letter. The back should be three inches higher than the front, 
and as a covering for maintaining a close atmosphere about the cuttings, we would 
advise you to have a neat frame glazed with sheet glass. ‘Two or three of those 
squares cf glass would do, but there is a risk of their cutting the hands, and also of 
March, 
