3138 
1883. Burritt, T. J. (Champaign, Ill.) New species of 
Micrococcus (bacteria). Am. Nat., vol. vir, 1883, p. 319. 
[3 page on blight. | | 
Same in Grove’s Bacteria and yeast fungi, London, 
1884, p. 10. | 
Abstract in Jour. Royal Micr. Soc., vol. 11, 1883, p. 
399. 
The technical description of M. amylovorus Bur., with notes on its oc- 
currence and action. ‘‘It may be cultivated in pure starch in water.” 
1884. Burritt, T. J. (Champaign, Ill.) Trunks of apple 
trees. Trans. Miss. Valley Hort. Soc. for 1834, vol. 11, p. 
178. [1 page on blight. | 
Same in Trans. Wis. Hort. Soc. for 1884-5, vol. xv, 
p. 216, [14 page. | 
The so-called ‘‘sun-scald,” which occurs on any part of the trunk, but 
more commonly on the south side, and in which the bark adheres firmly to 
the wood, is found by examination and inoculation experiments to be due to 
blight bacteria. The cambium is not always affected, and it may forma 
new bark and heal the spot. The heat or the sun promotes the growth of 
the bacteria; hence the more frequent occurrence of the disease on the south 
side, and on trees leaning to the northeast. Bacteria probably gain access 
through cracks in the bark. Leaning the trees toward the southwest, and 
providing a shield to the trunks, are protective measures. 
1884. PENHALLOW, D. P. (Montreal, Can.), and others. 
[Discussion on pear blight.] Rep. Mass. Agric. for 1884, 
p. 65. [4 pages. | 
Does not *‘ pretend to cure it yet,” but has ‘‘ submitted trees to treatment 
involving the use of sulphate of potash as a special fertilizer, and phosphates 
as a general food for building up the constitution, with a considerable degree 
of success.” Considers the disease constitutional, and that lack of nutrition 
is one of the primary causes. In hundreds of examinations has found but 
one pear tree in normal health, and thinks that in the reported cases of inoc- 
ulation of the disease with pathogenic bacteria, ‘‘the subjects were not in 
proper condition for inoculation.” 
B. P. Ware (Marblehead, Mass.) thinks the disease not constitutional, as 
it appears on different limbs of the same tree in different years, but ‘‘ the 
whole tree is not affected at the same time.” Mr. Hadwen had known the 
pear blight some fifty years, and always ascribed it to high cultivation. 
1884. ARTHUR, J. C. (Geneva, N..Y.) Report of the bot- 
anist. Rep. N. Y. Agric. Exper. Station for 1884, p. 357. 
[113 pages on blight. | 
Review in Country Gentleman, vol. L, 1885, p. 662. 
[2 col. ] 
Review in Gard. Monthly, vol. xxvu, 1885, p.. 284. 
[14 col. ] 
Resumé by Dr. J. H. Wakker in Nederlandsche 
Tuinbouwblad (Holland), vol. 1, 1886, p. 9. 
Partial account in Botanisches Centralblatt, vol. 
XXIV, 1885, p. 335. [3 page on blight. ] 
