PLATES. 
i l<ttc. Page, i 
I. Geratocystis iimbriata. 11 
ii. Geratocystis Iimbriata. 11 
in. Ceratocystis iimbriata. 11 
iv'. Experiments in treatment of plant diseases. 25 
v. Mon ilia fructigena. 39 
vi. Monilia fructigena. 39 
vii. Improved .Japy sprayer. 40 
vm. Improved Japy sprayer. 41 
ix. Improved Japy sprayer. 41 
x. New hollyhock rust. 50 
xi. Pierce on almond disease. 76 
xn. Pierce on almond disease. 76 
xiii. Pierce on almond disease. 76 
xiv. Almond orchard defoliated by Cercospora. 76 
xv. Eycleshymer on club-root. 68 
xvi. Eycleshymer on club-root. 88 
xvii. Waite on new species of Perouospora. 108 
xviii. Almond tree treated with ammoniacal copper carbonate. 238 
xix. Almond tree, untreated. 238 
xx. Almond tree treated with modified eau celeste. 238 
xxi. Pear leaf-bliglit. French pear stocks treated with Bordeaux 
mixture. 262 
xxii. Pear leaf-blight. French pear stocks untreated. 262 
xxiii. Pear leaf-blight. French pear stocks treated with ammoniacal 
solution. 262 
xxiv. Quince leaf-blight. Angers quince stocks, treated with Bor¬ 
deaux mixture. l62 
xxv. Quince leaf-bliglit. Angers quince stocks uncreated. 262 
xxvi. Cherry leaf-blight. Windsor buds on Mahaleb stocks, treated 
with Bordeaux mixture. 262 
xxvii. Cherry leaf-blight. Windsor buds on Mahaleb stocks, un¬ 
treated . 262 
\xvm. Plum leaf-blight. Early Prolific buds on Myrobolan stocks, 
treated with Bordeaux mixture. 262 
xxix. Plum leaf-blight. Early Prolific buds on Marianna stocks, 
untreated. 262 
xxx. Branches of Bartlett pear tree, untreated and covered with 
lichens. 268 
XXXI. Bartlett pear tree affected with lichens, after treatment with 
Bordeaux mixture....:. 268 
XXXII. Bartlett pear tree, sprayed with Bordeaux mixture. 336 
xxxiii. Bartlett pear tree, untreated and defoliated by leaf-blight_ 338 
xxxiv. Prune orchard treated for rust. 363 
xxxv. Prune orchard, untreated and defoliated by rust fungus. 363 
xxxvi. Treated prune tree 5 years old. 363 
xxxvii. Untreated prune tree 7 years old. 363 
xxxviii. The crown gall.......,, .. 377 
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