36o OBSERVATIONS ON THE 



C, C, C. Lymph du6ts in the bark. 



D, Dj D. Parenchymatous infertions from the bark, with the cells, &c. 



E, E, E. The rays of the wood, wherein the holes are air-vefleis. 



N.B. This root has no pith. 



ASH BRANCH, magnified. 



A. The bark. 



B. Bj B. An arched ring of fap-veflels, adjoining the fkin. 



C. C. The parenchyma of the bark, with its cells, and another ring 

 of fap-vefTels anfwering the former, but fituated more internally. 



D. A line of lymph-ducts immediately adjoining the fecond arched 

 ring of fap-veflels. 



E. E. The wood. 



F. The firft year's growth. 



G. The fecond year's growth. 

 H. The third year's growth. 

 I. The true wood. 



K. The great air-velTels. 



L. Lefler air-veffels. 



M, M, M. Parenchymatous infertions of the bark, radiating to the 



centre. 

 N. The pith. 

 O. Its bladders or cells. 



N, B, The G in the centre Jhoidd have been 0, 



VINE LEAF, magnified. 



Fig. I. The appearance of the air-veffels to the eye, in a vine-leaf 

 gently drawn afunder. 



Fig. 2. A fmall piece of that leaf. 



Fig. 3. The fame magnified, in which the veffels have the appear- 

 ance of a fcrew. 



Fig. 4. The appearance of thefe veffels as they exift in the leaf be- 

 fore they are ftretched out. 



PART 



