Anatomy of the Vine,. 



26? 



are at this time exactly the same as they were described in T> 

 on the 7th of August, 1829; for no change has since taken 

 place : but, in consequence of the increased diameter of the 

 vine during the summer, the vascular and cellular texture and 

 cuticle have separated from the vine in many places, and their 

 ragged appearance is represented at n n injig. 53. 



About the 7th of August, 1830. — You will find still more 

 remarkable changes take place at that time upon the shoot of 

 1829, marked abed in j'Sg 



53. ; for the liber will be then 

 pushed outwards, and a new 

 liber formed, in its place, ad- 

 hering to the present year's 

 alburnum as closely as the old 

 liber did a few days before. 

 Upon this new liber you will 

 find a covering of close cellu- 

 lar texture, exactly the same 

 as was described on the first 

 year's liber, on the 7th of 

 August, 1829, marked i i in 

 Jig. 52. in the description of 

 vessels called D. To prove it, 

 cut a horizontal slice of a col- 

 let from a vine similar to a, b 

 c d in fg. 53., when you will 

 be surprised to find what a 

 number of vessels will be sus- 

 pended of their animation, and 

 how few will afterwards carry 

 on the vital functions in that 

 part of the vine. I have also 

 added the time when such 

 vessels ceased to support the vine, and the period of the 

 formation of those that do, in the following description of 

 vessels, E, of/Sg-. 54. 



[E.] 

 Autumn, 1829 "| 



— 1829 



— 1830 



— 1830 

 August, 1830 



— 1829 



— 1829 



— 1830 

 /, New concentric layer from q to p 18301 

 m, Ascending sap-vessels - — 1830 ' 



New liber - - August, 1830 



c, Medulla 



b, Spiral vessels 



c, Concentric layer 



d, Ascending sap-vessels 



e, Liber 



f, Vascular texture 



g, Cellular texture and cuticle 

 i, Close cellular vessels 



About the 7th of August, 

 1830, the whole of 

 the vessels of last year 

 may be considered no 

 longer directly to sup- 

 port the vine. 



About the 7th August, 

 1830, these few vessels 



Close cellular vessels or covering -" 1830 J now su PP ort the vine - 



