CONTENTS. 
CHAPTER I. 
Some Account of the Appearance of the Disease in different parts 
of the World. 
Action of the British Government — Report of the British Commission- 
ers — Proceedings of the French Academy of Arts and Sciences — 
Report of Professor Morren—H. 8. Thompson on the prevention of 
curl and dry rot in potatoes — experiments with ripe and unripe seed 
— Causes of the disease stated~-Conclusions of Mr. Thompson — 
Objections tohis theory considered, . . . . . » OJ-—717 
CHAPTER II. 
A View of the different Theories entertained on the Potatoe Plague. 
First symptom of degeneracy of the plant in Scotland — Diseased tu- 
bers examined — Seeds from an over-grown crop will always be a 
diseased crop — Remedy proposed — Raising from the apple — Dis- 
ease supposed to be caused by rust —- European pamphlets on this 
subject — Result of chemical investigations —- Conversion of diseased 
potatoes into starch — Evil ascribed to too much moisture — Fungi 
analogous to smut im barley — Remedies against fungus — Disease as- 
cribed to various causes Professor Liebig’s opinion —~ Ascribed to 
fungus in the leaf— Sporules of fungi — Experiments in planting dis- 
eased potatoes — Disease supposed to attack the stem primarily — 
On new high ground the crop less affected — Opinion of J. E. Tes- 
chemacher — Salt a remedy — Analysis of sea~weed—A. B. Allen’s 
opinion — Cause of fungi, and remedies proposed, . . «. 76—04 
CHAPTER III. 
Cause of the Disease and Remedies stated. 
Review of the prevailing theories — The disease exists in the potatoe 
-— If fungi is the cause a certain remedy is at hand— Causes of the 
disease —— Over Rirening —Over CuLtivation — DETERIORA- 
TION OF SEED— CARELESSNESS IN SELECTING Seep — Improper 
management in taking up potatoes An improved method of plant- 
ing —Table-—Selecting potatoes forseed, . - + «+ 95116 
