INDEX. 



153 



Dextrine made from potatoe starch, 25 ; composition of, ib. ; used 

 to gum postage stamps, ib. 



Diseased vegetables, effects of, on animals, 135; effects of often de- 

 ferred, ib. ; effects of cooking on, 134. 



Diseased food, instances of death from, 135 ; must be deleterious, 

 136. 



Diseased potatoes, purposes for which they are employed, 137 ; con- 

 sequences of their use, 136, 137; English cholera, 136. 



Distillation from potatoes, 25 ; why abandoned, 26 ; from grain, 

 question of prohibition of, 132. 



Distribution of the potatoe plant, 27. 



Early varieties of potatoe less liable to the disease, 46. 



Earwing, probably a destroyer of Aphides, 106. 



Elder trees attacked by the Aphis vastator, 89. 



Electricity, effects of, on plants, 50. 



Endosmose may explain the motion of sap, 5. 



Enumeration of plants attacked by the Aphis vastator, 141. 



Eriosoma. See Aphis lanigera. 

 Eupteryx solani not the cause of the potatee disease, 62. 



Evelyn's account of the potatoe, 20. 



Exhalation of water from potatoe plants, immense, 5. 



Famines, frequency of, informer times, 128; enumeration of, ib. ; 

 prevention ot, by Governments, 129 ; question of, next year, 134. 



Fibre deficient in diseased plants, 124; probable means of obtaining 

 development of, 125 ; importance of early development of, 143. 



Fir trees destroyed by an insect, 100. 



Frost, action of, on potatoes, 26. 



Frosted potatoes used for distillation, 26. 



Fungi, prevalence of, on decaying matter, 56 ; question of origin of, 

 ib. ; various kinds of, ib. ; supposed to be the cause of the disease, 

 55; species found on potatoes, 56, 57; motion observed in, 59 ; 

 influence of, on the disease, ib. ; use of, in removing decaying 

 matter, 60 ; may render the potatoe poisonous, ib. ; attack the 

 turnip after the Aphis vastator, 76; relation of, to the injuries 

 caused by the family of Aphides, 102, 141. 



Gangrene of the potatoe plant. See potatoe, disease of. Sicca, or 

 dry, 28 ; humida'; or moist, ib. ; mode and progress of the attack, 

 29, 34. 



Geranium molle attacked by the Aphis vastator, 89. 



Gerard's description of the potatoe plant, 8, 19. 



Gluten in a state of putrefaction in diseased tubers, 40, 42. 



Government, duty of, in a time of scarcity, 130. 



Greatrex, Mr., his account of the disease, 45. 



Groundsel attacked by the Aphis vastator, 89. 



Guano, its influence on the disease, 54 ; its effects on other plants, ib. 



Haulrn, 3 ; result of cutting when diseased, 36, 122 ; if diseased, 

 should be burnt when the crop is gathered, ib. 



Hollin's description of curl, 108. 



