108 



VIII. Conclusion 



Our experiments were limited to 3 seasons so that there still remains 

 much to be examined in relation to the botanical physiology of the tree 

 and the cost of tapping but we give here a summary of the results of 

 our experiments. 



1. The method of tapping commonly practised in this country is 

 in accord with the principles of the growth of trees. It enables one to 

 collect the largest amount of lac from the tree, yet, when considered 

 from the economical point of view, it cannot be accepted as the best 

 mode of tapping. 



2. The prime exhaustion method incurs less expense in tapping 

 than the ordinary exhaustion metho.d. 



3. Lac should be collected from trees that have attained a larger 

 size than those commonly used which seldom exceeds 21 to 24 cm in 

 circumference. 



4. The yield of lac from a lac tree is directly proportional to the 

 square of the radius of the stem within certain limits of age. 



5. The lac trees in warmer regions give a large yield of better 

 quality than those in colder regions. 



6. Large trees produce better lac than small ones. 



