15. 
16. 
17 
18. 
19, 
20. 
21. 
22. 
23, 
24, 
25. 
26. 
27. 
28. 
SECTIONS OF WOODS GROWN IN BRITAIN. 
Abies excelsa (Norway Spruce), 
showing structure, canal, rays, 
and union of spring and 
autumn growths; x 60 
diameters. 
Thuju occidentalis (American 
Arborvite), showing  struc- 
ture, rays, and the effect of 
transplanting ; x 60 diam. 
Cupressus Lawsoniana (Lawson’s 
Cypress), showing structure, 
and union of spring and 
autumn growths; x _ 60 
diameters, 
Salisburia adiantifolia (Maiden- 
hair Tree), showing the pe- 
culiar tissue of the tree, union 
of spring and autumn growths, 
and coagulated sap in cells; 
x 60 diameters. 
Quercus Robur (Oak), showing 
vasa; x 200 diameters. 
Quercus Ilex (Evergreen Oak), 
showing vasa and structure ; 
x 80 diameters. 
The same; x 100 diameters. 
The same, longitudinal circum- 
ferential section, showing vas- 
cular tissue and medullary 
plates; x 100 diameters. 
The same, longitudinal radial 
section, showing vascular 
tissue and medullary plates ; 
x 100 diameters. 
Pyrus communis (Pear), showing 
vasa and medullary rays; 
x 80 diameters. 
The same; x 36 diameters. 
Pyrus aria (White Beain Tree), 
showing vasa, tissue, and rays; 
x 80 diameters. 
Acer Pseudo-Platanus(Sycamore), 
showing vasa, tissue, rays, and 
union of two seasons’ growth ; 
x 80 diameters. 
Acer campestre (English Maple), 
showing vasa, tissue, rays, and 
union of two seasons’ growth ; 
x 200 diameters. 
29. 
30. 
él. 
82. 
33, 
34. 
35. 
36. 
387. 
38. 
39, 
40. 
41 
42, 
47 
Alnus glutinosa (Alder), showing 
vasa, rays, and union of two 
seasons’ growth; x 80 diam. 
sculus Hippocastanum (Horse 
Chestnut), showing vasa, rays, 
and union of two seasons’ 
growth; x 80 diameters, 
Tilia europea (Lime), showing 
vasa, rays, and union of two 
seasons’ growth; x 80 diam. 
Juglans nigra (Walnut), showing 
vasa, tissue, and rays; x 80 
diameters. 
Llee aquifolium (Holly), showing 
vasa, tissue, rays, and union 
of two seasons’ growth; x 80 
diameters, 
Cerasus domestica (Cherry), show- 
ing structure, and union of 
two seasons’ growth; x 40 
diameters. 
The same, longitudinal radial 
section, showing medullary 
plates ; x 80 diameters. 
Clematis vitalba (Traveller’s Joy), 
showing structure of one year’s 
growth, including bark and 
pith ; x 35 diameters. 
The same, showing the tissue ; 
x 200 diameters. 
Berberis vulgaris (Barberry), 
showing vasa, tissue, and 
rays; x 80 diameters. 
Mahonia aquifolia (Mahonia), 
showing first year’s growth, 
bark, woody fibre, and pith; 
x 80 diameters. 
Populus monilifera (Black Italian 
Poplar), showing vasa, rays, 
tissue, and union of two 
seasons’ growth; x 80 diam. 
Salix alba (Willow), showing 
vasa, rays, tissue, and union 
of two seasons’ growth ; x 80 
diameters. 
Castanea vesca (Spanish Chest- 
nut), showing vasa, rays, 
tissue, and union of two 
seasons’ growth; x 80 diam, 
