20, 3 McLean and Lee: The Citrus-canker Organism 815 
TABLE 2.—Showing the results of immersing leaves of the Szinkom man- 
darin orange in an infusion of Pseudomonas citri and exerting grad- 
uated degrees of pressure upon such leaves—Continued. 
Pressure No. ceahied "| 
sg omg Twig No. Pratig: & Condition of leaves. eg , Cankers. | 
column. of twig. Period. 
em. Days, 
8.7 6 Dy Aa POwa e 11 | None. 
4,0 3 b 3 am, OY ta etands phavausdcc howe delen od 11 Do. 
5.0 1 2.| Two-thirds growits 22222.5,-00 2. sl pyc l Do. 
5.0 4 al RUB POW te es ll Do. 
5.0 7 4 | Three-fourths grown__......._..... ll Do. 
5.1 9 i pee OO see ce ae is Gara 26 Do, 
5.5 8 EY MM Wrowiites e  e 11 Do, 
5.6 6 Dy POON: AAS Be ll Do. 
7.8 ee: BAAS grownis gecesi 1 Soe eres es 11 Do. 
7.6 qT 8 |: Ewo-thirds grown ll Do. 
8.0 4 i One-third gtown 2 a li Do. 
9.5 7 RA POOL BOW ce, i ee 11 | 8a 
10.0 1 S oT wo-tnirds grown 3 11 | None. 
10.0 3 a) SEO Grown i 11; 2 
10.2 9 2:| Dwo-thitdserownh 2.3. 26 
10.5 5 Wi POU OW a ee 11 | None. 
10.5 4 Ota en ee 11) 6 
11.4 10 WISRABE COW ie 26 |) 5 
12.0 7 tess CUS. dic wwan ce Sonne ee ee ae 11 | None. 
12.2 10 2 | Three-fourths grown __._._._...____..___. 26 | 1 
12.4 3 Oy Pee ee ee 11 | None. 
13.4 9 Poet gnwn 2 26 | Numerous.¢ 
14.0 10 3 | Three-fourths grown _____....____....___. 261% 
14.4 3 Tes MO Sie 11 | None. 
14.4 4 5 | Two-thirds grown__._____._-__. cee li Do. 
215.5 5 Sar enw Scie hoe eons am ote Sar ri See 
16.0 1 4 | Three-fourths grown _..-.----_.-----_---- 11 | None. 
416.2 5 5 | Full grown soe hes ll Do. 
18.0 4 3 One-third Grown... oe eee ll | 48 
419.0 3 6 | Three-fourths grown _-.--..-.----_-..---_ 11 | Numerous. 
419.9 10 We a hss hc ce hse se 26 Do 
20. 2 2 ROOFER Bi oes sewn ll 
420.5 5 2 | Three-fourths grown -_........-.......__. 11 | Numerous. 
9121.0 4 RITE ROW ae occ cn ic eccuwcs 11 | 10 
21.0 3 Ey Twe-tiire Grer ooo, nen ee. 11 
921.6 9 Oy UE ee cea ns, ewe ames 26 | Numerous. 
421.8 9 Jg POR Oa oa gape png 26 | 4 
4126.7 5 Dy Dwecthirds grown. coos. ne 11 | Numerous. 
442.0 4 © Pe es oa ee cn 11 Do. 
ee 
* Infection at evident wound. 
> Character of infection suggests wounds. 
© Numerous; this observation was recorded only when the cankers were present s0 
abundantly as to make an accurate count impossible. 
“Leaf injected with infusion at the pressures recorded. 
To summarize briefly the results recorded in Table 2, with 
a very few exceptions immersion of Szinkom mandarin orange 
