of watches, which includes the gold watch which belonged to
Admiral Nelson the hero of Trafalgar. One of the most attractive
 and valuable of the collections in this section is that
recently presented by Mr. and Mrs. Herbert DuPuy, which
besides a wonderfully extensive series of miniatures, is rich in
enameled, inlaid, and carved boxes made of the precious
metals.

Historical collections are preserved either in the library of
the museum or on the third floor. Among the interesting historical
 objects is the skeleton of the horse upon which ““Stonewall”
 Jackson was seated the night he was killed at Chancellorsville,
 a number of the cannon surrendered by General
Burgoyne to General Gates at the battle of Saratoga, and the
collections belonging to the Pittsburgh Chapter of the
Daughters of the American Revolution.
The library of the museum is on the first floor. It contains
 the extensive private library of scientific works deposited
 by Dr. W. J. Holland, as well as the many thousands of
volumes collected by the museum.
The museum publishes a series of octavo volumes known
as the “Annals,” and a series of quarto volumes known as the
“Memoirs,” besides annual reports and other occasional
publications. The director emeritus of the museum is the editor
 of these publications.
From its inception the museum has carried on intensive
studies in various fields and has been one of the leaders of research
 in America, especially in zoology, botany, and paleontology.
 The museum has either sent out or assisted in sending
 out many expeditions to various parts of the globe. A
recent expedition from the museum traversed the interior of
the peninsula of Labrador from south to north, the first time
this feat was accomplished by white men. The results of the
researches are in part embodied in the “Annals” and “Memoirs”’
 of the museum.
Classes from the eighth grade of the public schools of Pittsburgh
 and schools of Allegheny county visit the museum
every day of the fiscal year. They are given instruction in
natural history by members of the museum staff detailed for
that purpose. In addition to these, annually, hundreds of