( 233 ) 
THE LABORATORIES 
Laboratories and working rooms for research are pro- 
vided on the upper floor of the museum building, and prop- 
erly qualified students of botany are permitted to make use 
of this equipment, under the direction of some member of 
the staff of the Garden. The equipment is designed to meet 
the needs of a very broad field of investigation including 
plant chemistry, pathology, physiology and morphology. 
An experimental garden and greenhouse at the nurseries 
are used in connection with the laboratories. A valuable 
series of old microscopes, illustrating the history and develop- 
ment of that instrument, was presented by the late Mr. 
Charles F. Cox. 
3. The Pinetum 
[COLLECTION OF CONE-BEARING TREES] 
The collection of cone-bearing trees, technically known 
as the Pinetum, because the pines are the most abundant 
of these trees, is planted over a space of about 30 acres in 
the southwestern part of the grounds, extending from the 
approach to the elevated railway station southeast to the 
herbaceous garden, and northeast to the museum building 
and the borders of the hemlock forest. The species of trees 
are grouped in genera, which are mostly separated by paths. 
The planting out of these trees was commenced in 1901; 
the collection will continually become more complete year 
by year as additional species are secured; many of these 
have to be raised from seed, and the process of establishing 
a collection of conifers thus requires much time. 
Commencing at the approach to the elevated railway 
station we find the Douglas spruce (Pseudotsuga mucronata) 
planted in the space between the traffic road and the park 
driveway to the left of the path leading to the conserva- 
tories; this tree is a native of western North America from 
the Rocky Mountains to the Pacific Coast and is sometimes 
known as red fir; in the far northwest it sometimes be- 
comes 180 to 210 feet high, its trunk occasionally as much 
