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1883. 
1884. 
1885. 
1887. 
1889. 
1889. 
1896. 
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YELLOW DISEASE OF HYACINTHS. 353 
LITERATURE. 
WAKEER, J.H. Vorlaufige Mittheilungen iiber 
Hyacinthenkrankheiten. Botan. Centralblatt, 
Nov. 1883, Bd. x1v, No. 23 pp. 315-316. 
WAKKER, J. H. Het geel-of nieuwziek der 
Hyacinthen veroorzaakt door Bacterium Hya- 
cintht Wakker. Onderzoek der Ziekten van 
Hyacinthen en andere Bol-en Knolgewassen. 
Verslag over het jaar 1883. Haarlem, Aug. 
1884, 8 vo., pp. 4-13. 1 colored plate. 
Waxkker, J. H., Het geel-of nieuwziek etc. 
Onderzoek etc., Verslag over het jaar 1884. 
Haarlem, May 1885, 8 vo. pp. 1-11. [See pre- 
ceding for full title.] 
WakKER, J. H. Het geel-of nieuwziek der 
Hyacinthen (Vervolg en slot). Onderzoek, etc. 
Verslag over het jaar 1885. Haarlem, May 
1887, 8 vo. pp. 1-5 and 27-37. 
WAKKER, J. H. Contributions a la pathologie 
végétale: 1. La maladie du jaune, ou maladie 
nouvelle des jacinthes causé par le Bacterium 
hyacinthi. Archives néerlandaises d. sci. ex. 
et nat., 1889 T. xxi, pp. 1-25, 1 colored 
plate. 
Trevisan. Genera. p. 19. See also Saccardo’s 
Sylloge Fungorum, Vol. VIII, p. 983. 
SmirH, Erwin F., The bacterial diseases of 
plants: A critical review of the present state 
of our knowledge. The American Naturalist 
vol. Xxx, 1896, Oct., pp. 797-804; Nov., pp. 
912-924. Also separates. 
An extended abstract of Dr. Wakker’s writings on the yellow 
disease of hyacinths. The only account in English. 
1897. SmitH, Erwin F. Wakker’s Hyacinth Bacter- 
ium. Proc. of the Am. Assoc. for the Adv. 
of Science, 1897, vol. XLvI, p. 274. 
A brief preliminary statement of some original work. 
1901. SmirH, ERwin F. Wakker’s Hyacinth Germ, 
Pseudomonas hyacinthi (Wakker). Bull. No. 
26, U. S. Dept. of Agric., Div. of Veg. Phys. 
and Path., Feb. 12, 1901, pp. 45, 6 text figures 
and 1 colored lithographic plate. 
Deals principally with inoculation experiments and the 
morphology of the organism, an account of the cultural char- 
acters being left for the following bulletin. 
1901. SMITH, ERwin F. The Cultural Characters of 
Pseudomonas hyacinthi, Ps. campestris, Ps. 
phaseoli, and Ps. stewarti—four one-flagellate 
yellow bacteria parasitic on plants. Bull. No. 
28, U. S. Dept. of Agric., Div. of Veg. Phys. 
and Path., Aug. 6, 1901, pp. 153. 
1908. Bos, J. Ritzema. Instituut voor Phythpatho- 
logie te Wageningen: Verslag over oderzo- 
ekingen, etc. in het jaar 1907. Wageningen, 
1908, p. II. 
The Yellow Disease of hyacinths was reported to Ritzema 
Bos from Hillegom in variety Innocence, early white, in the 
middle portion of 25 beds, the hyacinths on the five beds at 
either end remaining healthy. The hyacinths were propa- 
gated from sound mother buibs and the peculiar localization 
of the outbreak was not explained. 
