* 
62 QUEENSLAND AGRICULTURAL JOURNAL. [1 Jury, 1899. 
1 oz. to every gallon of water. his fluid should be held in a wooden tub. 
Potatoes that have been derived from a distant source should not, by reason of 
this circumstance, be regarded as necessarily ‘“‘ clean.” 
9. The immediately preceding suggestion has reference to cases in which 
the seed, though possibly carrying the germ, is not itself diseased. But the 
latter condition may occur, and it should therefore be subjected to a very 
close scrutiny, in order to discover whether it is sound or otherwise ; and, io 
unhealthy, discarded and destroyed. The following appearances will indicate 
the occurrence of the malady in a latent or temporarily undeveloped state— 
(a) A wetness at the eyes, accompanied by a slight exudation of a froth- 
like matter, when the seed is kept warm and damp, as, for instance, 
by covering it with a wet sack. r 
(b) Sunken brown or blackish-brown areas on the surface, or (in white- 
skinned potatoes) patches of dark discolouration showing through 
the outer skin. 
(c) Adherence of soil to the eyes, which soil, when remoyed, will appear 
to be covered, where in contact with the bottom of the eye, with a 
greyish clossy film (dried gum). 
(d) A potato being cut across with a sharp and clean knife, and the sap 
upon the exposed surface being allowed to dry off, small droplets of 
a whitish, glossy, pus-like matter will appear at places along the 
course of the line or ring that runs a short way within the margin 
nearly parallel thereto, except where it sends an extension to any 
eye that may be cut through. These droplets are especially 
discernible when the section is looked at obliquely, when their 
bright lustre brings them into view. A small patch of decay 
present along the indistinct line alluded. to, or between it and the. 
outside of the tuber, may also be usually regarded as indicative of 
the presence of the disease. Potatoes cut in preparation for planting 
should always be examined with the object of detecting such 
appearance in view, and suspicious sets rejected and burnt. 
10. These recommendations as to treatment are based on a recognition of 
the cause and fundamental nature of the disease as set forth in general terms 
in the first section of the report, and that have been revealed for the first time 
by the writer as the outcome of patient research. They may be SUES 
by others that it is within the capacity of the intelligent farmer himself to 
devise, now that he has been enlightened on these points. 
BIBLIOGRAPHY, 
A “Preliminary Report on a New Potato Disease prevalent at Ravens- 
bourne, at Corinda, and in other parts of Southern Queensland,” by the writer, 
was submitted by him on 27th April, 1894. This contained sections dealing 
with the following subjects:—Symptoms; Mode of Occurrence ; History of 
Occurrence; Amount of Injury ; Other Outbreaks ; Cause (including deserip- 
tion, mode of occurrence, and development on artificial media of the bacillus— 
illustrated by figures); Conclusion (recommendation as to treatment). This 
memoir was neither printed at the time nor subsequently, but a summary of it 
was published by the Department of Agriculture, and this forwarded to different 
papers and institutions. This summary appeared in the various Queensland 
daily and weekly journals, including the Queenslander of 12th May. It was also 
pate in the “Annual Report, Queensland Department of Agriculture, 1893-4, 
risbane, 1894.” Again, an abstract of it, written by Professor Schimper, of Bonn, 
was contributed to Dr. Paul Soraurer’s Zeitschrift fiir Pflanzenkrankheiten for 
1895 (op. cit. Band V., pg. 234). Further, Professor B. T. Galloway (Chief of 
the Division ‘of Vegetable Physiology and Pathology of the U.S. Department of 
Agriculture), in acknowledging it—the receipt—at the time stated as follows :— 
“1 have read with interest the account of the New Potato Disease ; and while I 
cannot say positively that what you have described oceurs here, 1 think it very 
