Senile Changes in Leaves of Certain Plants 



311 



TABLE 20. Area of Vein Islets in Leaves of Vines 29 and 30 



Number of leaf 



Length 

 (centimeters) 



Breadth 

 (centimeters) 



Area 



(square 



centimeters) 



Weight 

 (grams) 



Area of 



islets 



(square 



millimeters) 



Vine 29, 2.5 centimeters in diameter, 10 annual rings (only five leaves photographed) 



11 



12 



90 



14 



15 



145 



13 



13 



115 



15 



14 



135 



16 



15 



155 



1.1 



1.6 

 1.3 

 1.5 

 1.7 



0.3613 

 0.3725 

 0.3617 

 0.3867 

 0.3975 



Vine 30, 12.7 centimeters in diameter, 50 annual rings 



1 



8 



7 



42 



0.5 



0.2013 



2 



8 



8 



50 



0.6 



0.1809 



3 



8 



6 



40 



0.5 



0.2311 



4 



8 



7 



45 



0.6 



0.2263 



5 



10 



10 



70 



0.8 



0.1491 



6 



9 



9 



60 



0.7 



0.1347 



7 



9 



10 



64 



0.7 



0.1509 



8 



9 

 10 



9 

 10 



62 

 70 



0.7 

 0.8 



0.1814 



9 



0.1337 



10 



10 



9 



60 



0.7 



0.1416 



Average area of islets for vine mth 10 rings . 3759 square millimeter 



Average area of islets for vine with 50 rings . 1731 square millimeter 



TABLE 21. Summary of Relation Found between Age of Vine of Vitis vulpina and 

 Area of Vein Islets in the Leaves 



Number of vine 



Number 



of annual 



rings 



Area of 



islets 



(square 



millimeters) 



Number of vine 



Number 



of annual 



rings 



Area of 



islets 



(square 



millimeters) 



3 



3 



5 



5 



5 



5 



6 



6 



6 



10 



10 



11 



11 



14 



14 



15 



0.5154 

 0.5056 

 0.4994 

 0.4845 

 0.4657 

 0.3983 

 0.3946 

 0.3684 

 0.3759 

 0.3453 

 0.3690 

 0.3574 

 0.3303 

 0.3281 

 0.3250 



14 



16 

 17 

 17 

 22 

 25 

 25 

 25 

 28 



0.2966 



19 



27 



3160 



23 



22 



3310 



17 



5 



4 



0.2901 



15 



0.2692 



13 



20 



28 



2503 



11 



2327 



2 



1 



10 



18 



26 



30 



6.... 



2040 



29 



30 2291 



24 



35 

 35 

 50 

 56 



57 

 70 



. 2335 



21 



2178 



25 



1731 



9 



0.1807 



16 



8 



12 



7 



0.1640 

 1376 







