INVESTIGATIONS ON THE MULBERRY TREE. 



495 



On the 20th May, a number of leaves were collected from 

 each tree for analysis ; each leaf measured on the average 9 cm. in 

 length and weighed on the average (of 50) in case (A) O.320 gram ; 

 in (B) 0.304, in (C) O.303 gram. On analysis, I obtained the follow- 

 ing results. 





A 



B 



c 



Water 



80.82 



80.85 



80.04 





19.18 



19.15 



iq.c.6 



Organic matter (in the dry 



substance)9i.63 



90.98 



91.19 





0.37 



9.02 



I8.8I 





13-10 



13-68 



18. I I 



Fat 



5-34 



4.56 



4.49 



Total carbohydrate 



23.14 



22.92 



23-44 





28.56 



2331 



23-25 



Total nitrogen 



4-25 



3-73 



3-72 



Albuminoid nitrogen 



3-47 



3-29 



3.28 



Amido-nitrogen 



0.78 



0.44 



0.44 



Non-nitrogenous extract 



(except 









21.49 



26.51 



21.90 



We observe here that by liming alone, the percentage of 

 w oody fibre decreased from 18.10%" to 13.68, while the non-intro- 

 genous extract had increased from 21.90 to 26.50 % ; further by 

 liming and manuring with sodium nitrate and calcium sulphate, 

 not only had the amount of fibre deceased from 18. 11 to 13. 10 % 

 but the proteid had increased from 23.25 to 28.56% and the fat 

 from 449 to S-34%- 



It can not be denied that this special manuring produced 

 leaves of superior nourishing quality and it remains to compare 

 the effect of these different leaves upon the silk worm. 05 



II. On the Amount of Reserve Material in the Bark 

 of the Roots and /"ranches of 

 the Mulberry Tree. 

 It appeared to me of some interest to determine the extent 

 to which the reserve material deposited in root and branches is 

 consumed in spring time. 



On the 25th January roots about 1 cm. in diameter were col- 

 lected whose bark was separated for analysis (a). This was re- 



(1) In September of the same year the tree 15 had gained in height one fourth and 

 the tree A about one third compared with the control tree C. 



