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same material. On the 6th May spermogonia and on 3rd June perfect Mcidia 
were noted, the control barberry remaining free from the fungus. 
Exp. 19.—On 9th May a similar barberry was infected. On 25th spermogonia 
and on 15th June perfect Zeidia were noted. The control barberry remained 
free from the fungus. 
AQCIDIUM BERBERIDIS AND PUCCINIA GRAMINIS. 
Exp. 48.—24 wheat seedlings growing in a flower pot, which had been con- 
tinually covéred by a bellglass from the day the wheat was sown, were on 23rd 
May infected with ripe spores of Zcidium berberidis, sent for the purpose by Mrs. 
Howell, of Drayton Rectory. On the 3rd June sickly yellow spots appeared on 
some of the plants: onthe following day (4th June) true Uredo linearis made its 
appearance. On 8th June the pot was removed from the garden into a room in the 
house, and the diseased plants removed. By the 30th every plant had the parasite 
onit. A similar pot of wheat seedlings grown under exactly similar conditions, 
but not infected with cidium spores, remained free from Uredo. 
Exp. 80.—Five wheat plants which had been reared under a bellglass were on 
the 28th June infected with Zcidium berberidis spores from Exp. 14; on 17th June 
Uredo appeared on one leaf, and three days later on the others. The five control 
wheat plants remained healthy. 
Exp. 81.—Many wheat seedlings reared under a bellglass were on 28th June 
infected with cidium berberidis spores ; on 16th August Uredo was noted on them. 
A similar pot of wheat seedlings not infected with the dcidia spores remained 
healthy. 
PUCCINIA CARICIS AND ANCIDIUM URTICH. 
Exp. 2.—On the 8th April three plants of Urtica dioica were planted ina 
flower pot; around them was laid a quantity of Carex hirta, with last year’s 
Puccinia caricis on it. The pot was covered by a bellglass, and freely watered. 
On 2nd May two of the plants were heavily affected with Mectdium urtice ; on 6th 
May the nettles were planted out, and the Carex straw removed and destroyed. 
On 9th May all three plants were much distorted, both on their stems and on their 
leaves, with the Meidium. 
AQCIDIUM URTICH AND UREDO CARICIS. 
Exp. 33.—On May 15th a clump of healthy Carex hirta grown in a flower pot 
under a bellglass for three weeks, had two leaves of nettle with cidium on 
them from the previous experiment (Exp. 9) laid upon it; on 15th June Uredo 
caricis made its appearance, and by 1st July it had affected many of the Carex 
leaves. 
Exp. 49.—Three scions of Carex hirtu from South Wootton were on the 26th 
May infected with spores of Heidium urtice ; on 3rd June sickly spots were noted, 
which five days later (on 8th) were the site of Uredo pustules. On 21st all the 
plants were affected with the Uredo. 
Exp. 26 (1881).—Four plants of Carex hirta were infected on 21st July with 
Aeidium urtice, and four similar plants kept as checks. On 15th August Uredo 
