One telescope, magnifying power 120.
One circle, by Gambey, Paris.
One sextant, by Gambey, Paris.
One sextant, by Troughton.
One box chronometer, No.7,810, by French.
One Brockbank pocket chronometer.
One small watch with a light chronometer balance, No.
4,632, by Arnold and Dent.

The rate of the chronometer, 7,810, is exhibited in the following statement:

"NEW YORK, May 5, 1842
"Chronometer No. 7,810, by French, is this day at noon--
"_Slow_ of Greenwich mean time, 11' 4"
"_Fast_ of New York mean time, 4_h._ 45' 1"
"Loses per day 2".7
"ARTHUR STEWART, 74 Merchants' Exchange."

An accident among some rough ground in the neighborhood of the Kansas
river, strained the balance of this chronometer, (No. 7,810) and rendered
it useless during the remainder of the campaign. From the 9th of June to
the 24th of August, inclusively, the longitudes depend upon the Brockbank
pocket chronometer; the rate of which, on leaving St. Louis, was fourteen
seconds. The rate obtained by observations at Fort Laramie, 14".05, has
been used in calculation.

From the 24th of August until the termination of the journey, No. 4,632
(of which the rate was 35".79) was used for the same purposes. The rate of
this watch was irregular, and I place little confidence in the few