04 QUINCE CULTURE!. 



being inoculated with a piece of the surface of one dis- 

 eased, the spores germinated, and the rotting slowly 

 progressed to the twenty-second day, under a bell glass, 

 when the decayed spot was an inch and a half in diam- 

 eter, and showed fruiting points of the disease. 



So long as the wax-like covering of fruit remains per- 

 fect, it is difficult for the spores of disease to affect it ; 

 but the sting of an insect, the abrasion of a chafing limb, 

 or a bruise will make a way for the germs of disease to 

 enter. Hence the importance of great care in handling 

 the fruit. No other preventive is known for this disease. 



8. BARK BOUND or HIDE BOUND. This may arise 

 from the depredations of scale insects weakening the 

 vitality of the cells, or it may arise from an undue reduc- 

 tion of the top in pruning or grafting, producing a dis- 

 proportion between the leaves and the numerous cells 

 under the bark, by which their expansive force is weak- 

 ened too much to push out the bark ; or injury to the 

 roots may so far weaken the power of these ceils that 

 they become unequal to the task required of them. Pro- 

 vision is made for the expansion of the bark by the forma- 

 tion of cork-like cells, called suber cells, which expand so 

 as to rupture the outer bark, and allow a proper enlarge- 

 ment of the growing tree. Every tree has its own suber 

 cell, and so the rifts in the bark of each are according to 

 its own peculiar character, no two appearing just alike. 

 When, from any cause, the tree has become larlc lound, 

 a slit of the knife will help in doing what these cells 

 failed to perform. The slit should be very carefully 

 made, lest, instead of helping, it injure the tree by its 

 severity. Be very sure the malady exists before the 

 remedy is applied, or great harm may follow. 



