£12 DESCniPTlON OF THt TIER. 



newly barked. There he will not only see the buds ju»t 

 breaking through, but the variation in each different tree in 

 this respect-— the manner in which each point of the com-* 

 pass is marked by its growth, by the scarcely undulating 

 line of the sap vessels in the north, and by their never end- 

 ing half circles in the south. 



I am, Sir, 



Vour obliged servant, 



AGNES IBBETSON. 



Explanation of the Plate* 



PI. V, fig. I. A bundle of leaves taken out of the inner 

 leaf bud of the Scotch fir, while weaving; with their ca- 

 lyxes. 



Fig. 2. A single leaf much magnified, and showing the 

 manner of forming all the leaves of the pines. 



Fig. 3. A sort of general or mixed bud in the Scotch fir, 

 when the leaves, d d, are completely formed, and they are 

 discovered at the top of a bud ; while the female cones, c c, 

 are shooting from the line of life, though not one in ten 

 lives to come out of the cradle in the bark, pp. 



Fig. 4. The squama taken out of the Scotch fir. a a 

 ihe pistil : o o the two drops : b b the line of life running to 

 the seed, and entering it, to form the heart at/: c the 

 nourishing vessels entering the seed at dd: and fastened to 

 the cone at ^ e. 



Fig. 5. The male collection of stamens or catkin. 

 , Fig. 6. A single stamen with its scale. 

 "^ Fig. 7« A squama of the cypress kind, taken from the 

 wTiite cedar. 



Fig. 8. The same dissected: h the pistil: iithe drops 

 appearing to catch the powder: kky the line of life passing 

 into the seed at r r. / the nourishing vessels passing into 

 the seeds at 7iM, and then joining the cone at mm. 



PI. VI, fig. !• The male catkin of the cypress kind. 



IX. 



