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interesting astrolabe,under the immediate care of Professor Mason. Professor Mason has added a few watches that have been held in his own department.
A collection of old surveying instruments has been received from the Surveyor-General of Florida through the Department of the Interior. It is supposed that these instruments were used by Andrew Ellicott,esq., the Commissioner,on the part of the United States,in laying the boundary line between Florida and Georgia in the year 1795 in conjunction with the Spanish Commissioner,Captain Minot.
A set of bronze weights,and the works of an ancient clock,purchased at the request of Secretary Langley by Colonel F.A.Seely,of the U.S.Patent Office,in Spain,have also been received.

[[strikethrough]] Very respectfully yours, 
^[[W.C. Winlock]]
Hon.Curator of Apparatus. [[/strikethrough]]