1897.] The Bacterial Diseases of Plants: 39 
(14) Vitality on Various Media.—No statement. 
(15) Effect on Growth of Reaction of Media (acid, neutral, alka- 
line).—No statement. 
(18) Sensitiveness to Antiseptics and Germicides.—No statement. — 
(17) Other Host Plants—The common onion, Allium cepa, 
was inoculated both in the leaves and in the bulbs, and in both 
cases with positive results. This plant must therefore be in- 
cluded as a possible host. Inoculations into other plants, such 
as Richardia, Chlorophytum, Triticum, Phaseolus, etc., gave 
negative results. 
(18) Effect upon Animals.—No statement, and probably no 
experiments. 
(III) Economic ASPECTS: 
(1) Losses—Disease not observed in the field. 
(2) Natural Methods of Infection —Not known. 
(3) Conditions Favoring the Spread of the Disease-—Not known. 
(4) Methods of Prevention —No suggestions. 
Remarks.—Organism not satisfactorily described. The first 
part of the paper is devoted to a brief review of papers by 
Wakker and Sorauer. De Toni and Trevisan in (11) Saccardo’s 
Sylloge, vol. VIII, p. 984, under B. hyacintht Wakker, make the 
following remark concerning B. hyacinthi septicus Heinz,—“ ver- 
isimiliter huc spectat.” The reason for this remark is not ap- 
parent. Certainly, so far as we can judge from the published 
statements of Drs. W. and H., the two organisms are widely 
different in their pathogenic effects, and also in their behavior 
on culture media. The rapid destruction of the host by Dr. 
Heinz’s germ is specially noteworthy. 
Whether the hyacinth disease described by Dr. Sorauer is 
distinct or identical with the preceeding, whether it is identical 
with the white rot of the Netherlands, or, finally, whether it 
is in any proper sense of the term a bacterial disease at all, 
must be left an open question. His account of the symptoms 
especially in the foliage certainly suggests the disease described 
by Heinz. Sorauer himself identifies it with the white rot of 
the hyacinth described by Schneevoogt and others, and also 
erroneously supposes it to be the same as the yellow disease 
described by Wakker. Dr. Sorauer made numerous and 
