340 BACTERIA IN RELATION TO PLANT DISEASES. 
From a comparison of these two tables it appears that none of the varieties regarded as 
“very susceptible twenty five years ago have ceased tobe susceptible, but rather, that some of 
them have been discarded by certain growers on this account. On the contrary, some of 
the varieties then regarded as very resistant continue to be very resistant, @. 8.5 Robert 
Steiger, single red; Baron van Tuyll, single rose; Grandeur 4 Merveille, single bluish white; 
Marie, single dark blue. It also appears that some varieties then regarded as resistant are 
now classed as very susceptible, e. g., Charles Dickens, single rose; La Grandess, single 
white; Czar Peter, single light blue; Hermann, single yellow, and Mont Blanc, single white. 
Respecting these latter cases, we may assume (1) that they have changed in this par- 
ticular during the last two decades, or (2) that they were susceptible from the start, but 
had not at that time been subjected to rigorous tests calculated to bring to light their 
inherent susceptibility. 
For the sake of those who may desire to see all the discrepancies, I append also my 
entire list, premising that 0 means very resistant; + much subject; and § intermediate or 
no report. To find the varieties not marked by these growers the reader has only to consult 
any good catalogue of Dutch bulbs. 
Table giving complete list of varieties mentioned by one or more of the three Dutch 
hyacinth growers in 1906, as resistant or susceptible to the yellow disease: 
Single red: 
Amy 0 § § 
Etna § §0 
Garibaldi + § § 
Gertrude §00 
Homerus § 0 0 
Incomparable + § § 
King of the Reds+§ § 
Linnaeus+ § § 
Pélissier 0+ § 
Prima donna+ § § 
Queen Mary +§ § 
Robert Steiger 000 
Roi des Belges § § o 
Von Schiller+§ § 
Vuurbaak + § § 
Single rose: 
Baron v. Tuyll oo § 
Beauty of Waltham-+ § § 
Carlyle +§ § 
Charles Dickens+-+§ 
Dr. Livingstone+§ § 
Maria Cornelia+o § 
Gertrude § §o 
Gigantea 0 §o0 
La joyeuse + § § 
Lady Derby 0 § § 
Moreno oo § 
Norma 0 § § 
Princess Héléne § §+ 
Rosea maxima 0 § § 
Rosine § 0 § 
Sophia Charlotte § §+ 
Sultan’s Favorite §+§ 
Windhorst § §+ 
Single white: 
Alba maxima § §+ 
Alba superbissima § §+ 
Albertine §+§ 
Angenis Christiana § 0 § 
Baroness van Tuyll 0 0 § 
Blanchard § §+ 
British Queen § §+ 
Crown Princess + §+ 
Grand Vainqueur i §+ 
Grande Vedette+§ § 
Jenny Lind § §+ 
La belle Blanchisseuse 0 § § 
La Grandesse +++ 
La neige +++ 
La précoce + §§ 
L’Innocence 0+ § 
Madam van der Hoop § §+ 
Mary Stuart+§ § 
Mina § §+ 
Mont Blanc+§+ 
Paix de l’Europe § § 0 
Mr. Plimsoll § 0 § 
Queen of England +§§ 
Snowball + §+ 
White Bird 0 § § 
Grandeur a Merveilleo 0 0 
La Franchise 0 0 § 
Lord Grey + § § 
Mammoth o § § 
Voltaire o § § 
Single light blue: 
Blondin § § o 
Captain Boyton ++8§ 
Clio §0 + 
Czar Peter +++ 
Enchantress § §+ 
Grand Lilas +++ 
Grand Maittreooo 
La Peyrouseooo 
La Precieuse +§ § 
Leonidas § ++ 
Lord Beaconsfield § §+ 
Lord Derby++-+ 
Lord Palmerston § ++ 
Orandates+ § + 
Pieneman § 0 § 
Prince de Taillerand +§ § 
Princess Mary of Cambridge +§ § 
Queen of the Blues § + + 
Regulus 0 0 § 
Schotel + §+ 
Turquoise § o § 
Single dark blue: 
Argus §++ 
Bleu mourant § o § 
Baron van Tuyll § 0 § 
King of the Bluesooo 
La nuit § §+ 
Leopold IT 0 § § 
Lord Mayo § §+ 
Marieooo 
Baron von Humboldt +§ § 
General Havelock + § + 
King of the Blacks +§ + 
Masterpiece +§+ 
Mimosa §+-+ 
_Pasteur+§ § 
Sir Henry Barkley +§+ 
Uncle Tom § §+ 
William I+§+ 
William III § §+ 
Single violet, lilac, and mauve: 
Distinction o § § 
Lady Stanhope § §+ 
Laura § § 
L’Honneur d’Overveen+ § § 
Lilas énorme § §+ 
L’Unique § §+ 
Mauve Queen § 0 § 
Sir Edwin Landseer § §+ 
Sir William Mansfield § 0 § 
Single yellow and orange: 
Anna Carolina +§ § 
Bird of Paradise + §+ 
City of Haarlem § § + 
Duc de Malakoff § §+ 
Hermann +++ 
Ida +§+ 
King of Holland § §+ 
King of the Yellows 0 0 § 
La Citroniére +§+ 
La Grande Jaune §+§ 
L’Or d’Australie §+ + 
Marchioness of Lorne § §-+ 
Obélisque 0 §+ 
Yellow Hammer 0 0 § 
Double red: 
Kastanjebloem o § § 
Noble par mérite o § § 
Princesse Louise + §+ 
Princesse Royale 0 0 § 
ee 
