Iv. QUEENSLAND AGRICULTURAL JOURNAL. [1 Mar., 1899. 
4. The fumigating chamber may be made of any convenient size or material, the essential point 
being that it shall be capable of being closed absolutely airtight, and provided with a fue 
in the roof which can be opened or closed to allow of the escape of the gas after fumigation, 
‘flue must be provided with a box or chamber to contain caustic soda or potash to destroy the gas. 
The fumigating chamber must be provided with a shutter or sliding panel in the lower portion 
of the door or wall. ’ 
Door, flue, and shutter must all be made to close absolutely airtight. 
Directions ror Fumicatinc witn Hyprocyanic Acip Gas. 
Proportions of Ingredients.—For every 150 cubic feet of room take 1 ounce of cyanide of potas- 
sium, 5 fluid ounces sulphuric acid, 10 fluid ounces water. 
Having placed the fruit to be fumigated in the chamber, see that the flue and the shutter in the 
door or lower part of all are properly closed. 
The acid is then to be diluted in the following manner :—The whole of the water is placed in 
a shallow china or glazed earthenware vessel, such as an ordinary wash-hand basin. (Metal 
vessels are inadvisable unless they are leaden ones.) ‘The sulphuric acid is next poured on to the 
water in a thin stream, stirring the while with astick. Do not mix by adding the water to the acid. 
The basin containing the acid thus diluted (which should be allowed to cool) is now placed in 
the fumigating chamber, and the cyanide of potassium is emptied into it. 
The gas is given off with great violence, and the door should be immediately closed, 
The whole is now to be left to itself for one hour. At the end of this time the shutters in the 
flue and in the door are opened, and the draught produced drives the gas out of the chamber, At 
the end of half an hour the door is thrown open, and if the draught has been effective there should 
be hardly any trace of hydrocyanic gas recognisable. The chamber may be left in this condition 
for another ten minutes or a quarter of an hour. The fruit is now to be moved and allowed to 
remain in a well ventilated place, preferably out of doors, for another half an hour. Samples of 
fruit will be examined from time to time by the entomologist. 
Cuution.—As hydrocyanic acid gas is most deadly in its effects on animal life, the greatest 
care must be taken in its use. 
Department of Agriculture, 
Brisbane, 518 
This is to certify that has treated cases of citrus fruit with bydrocyanic 
acid gas for one hour, under my supervision. These cases have been branded ‘Crown over 
“Passed.” 
Shipping marks: 
Per 8.8. : 5 
Consigned to: 
Department of Agriculture, 
Brisbane, 26th J: anuary, 1899, 
pee following Proclamation by His Excellency the Governor of New South Wales is 
published for general information. 
J. V. CHATAWAY. 
New Sour Wates, PROCLAMATION, 
to wit. By His Excellency The Right Honourable Hunry Roger, Viscounr 
(L.8.) _  Hamppen, Governor and Commander-in-Chief of the Colony of 
HaAMppEn, New South Wales and its Dependencies. 
Governor. 
Wuereas the Governor is empowered by Section 9 of the “ Vegetation Diseases Act, 1897.” trove 
time to time, by Proclamation in the Gazette, to declare any fungus or vegetable parasite what- 
ever to be a fungus within the meaning of the said Act: Now, therefore, I, Henry Rosert, 
Viscount Hampprn, the Governor aforesaid, with the advice of the Executive Council, do, 
by this my Proclamation, declare Black Spot (Husicladium) to be a fungus within the meaning 
-of the said Act. 
Given under my Hand and Seal, at Government House, Sydney, this twenty-second day of 
December, in the year of our Lord one thousand eight hundred and ninety-eight, and 
in the sixty-second year of Her Majesty’s reign. 
By His Excellency’s Command, 
JOSEPH COOK. 
Gop Save tur Qurzn! 
