86 
timbers of North America. These monographic groups are being 
finished as rapidly as proper curing of the specimens will permit. 
The scheme is to represent each species by the following grouped 
specimens : 
/. A branch from the tree, in leaf, with the flowers and fruits, 
and an authentic piece of wood from the individual furnishing the 
branch. 2. A photograph of the tree in summer, showing its 
general form and character of growth. j>. A photograph of the 
identical tree in winter, showing its method of branching and gen- 
eral winter aspect. 4, A trunk section showing the bark and 
form characters ; these trunks to be uniformly one-half the average 
size attained by the species, j. A cross section of the same 
trunk, showing the character of the annual growth. 6. A large 
detail map of North America, upon which the range of the species 
is depicted in three grades of color, showing the principal, gen- 
eral, and limital extension of the timber. 7. A descriptive label, 
giving the characters and utilization of the species. 8. A large 
plank, plain sawed, showing the objective commercial character 
of the lumber, g. Various fancy boards showing the cabinet 
forms of the species. 
Between Cases 86 and 87 , — Woods of Canada and California, 
also fine specimens of redwood burl, Washington pine and Ken- 
tucky yellow poplar. Beyond Case 87. at the end of the Section, 
may be seen four excellent examples of the principal timber trees 
of Alaska. 
Case 88, — Cereals of the United States, with milling products 
illustrating their uses. 
WALLS OF THE ROTUNDA. 
On the walls of the Rotunda will be found a framed set of 
Herbaceous Plants, each frame containing a family. They are ar- 
ranged in their natural order, beginning on the west face of the 
northwest corner and passing southward. This collection serves 
to illustrate the grouping of plants according to their botanical 
characters. 
On the floor of the north transept are three cases, two of Lichens 
and one of Mosses, each containing sufficient species to fairly rep- 
resent the genera of these classes of plants. 
