194 



The Canadian Horticulturist. 



^.-tlilby 



Fig. 47 shows a vertical section of a leaf thus 

 aflfectcd, swollen out of the normal thickness ; a, 

 as above, representing the upper, and b the under 

 surface. The cellular structure of the under sec- 

 tion is very little changed, but the change in the 

 upper portion is easily seen. The walls between 

 each of the cells above have become much thick- 

 ened, and the long narrow cells much swollen and 

 divided. The result will be that the leaf will have 

 a tendency to curl undcrward. The dark lines in 

 these cells represent the vegetative portion of the 

 fungus, which penetrates among these cells. This 



These 



Fig. 47. 

 vegetative portion throws out numerous branches, as shown in Fig. 48 



enlarge and form asci or fruiting portions, 



containing six or seven spores each, which 



are the means of spreading the disease. 



Sometimes a somewhat similar effect upon 



the peach leaves is produced by the peach 



tree aphis, when it is very abundant. This U^^/' ~]T ^/^^^i 



louse, by sucking the juice from the under /^^^^^^^l JL lU^^oC""^*^ 



side of the leaves, cause hollows with cor. ^| / \ )/ 1(~\\^ 



responding reddish swellings above, and Fig. 48. 



the leaves, in consequence, are made to curl. These may be destroyed by a 



decoction of tobacco and water, or by the kerosene emulsion. 



A MODEL EXPERIMENT STATION. 



One of the most novel, instructive and elaborate exhibits, and one that 

 will undoubtedly attract the attention of every scientific person and scholar 

 interested in any phase of agricultural life, will be that made by the Association 

 of American Agricultural Colleges and Experiment Stations. This exhibit will 

 occupy nearly 8,000 square feet of space, and will be located in the southwest 

 corner of the building, on the first floor. It will represent the entire work of a 

 model Agricultural Experimeni Station, covering entirely the field of experiment 

 and research in crops, botany, horticulture, entomology, feeding stuffs, animal 

 nutrition, dairy solids, milk testings and veterinary science, and will include an 

 elaborate and complete botanical, biological and chemical laboratory. — 

 Selected. 



A Coon Practice commends itself to the orchardist in the cultivation of 

 hoed crops between trees, not alone in the extra air and sunlight given to the 

 soil, but in the moisture saved for tree's use. Mulching is a great thing for trees, 

 and next to mulching is surface stirring. — Farm and Home. 



