in many places where later in the year there is not a drop. Only in the dry season the experiments would be decisive.

Respectfully submitted.

Captain J. H. SIMPSON,

H. ENGELMANN, Geologist.

Chief of Topographical Engineer Department,

Department of Utah.

APPENDIX B.

Itinerary of a wagon route from Camp Floyd to Fort Bridger, explored and opened by Captain J. H. Simpson, Corps Topographical Engineers, under instructions from the headquarters of the department of Utah, in the fall of 1858.

APPENDIX C.

Itinerary of a wagon route from Camp Floyd to Short-cut Pass, in the Great Salt Lake Desert, reconnoitred by Captain J. H. Simpson, Topographical Engineers, under instructions from the headquarters of the department of Utah, in the fall of 1858.

14

Summit of Reynold's pass into Skull valley..
Dry branch; water here only occasionally,

and therefore not to be depended upon. West end of pass; get into skull valley; springs on bench of mountain, two miles south.

Willow springs; grass here abundant, but not very good; water tolerable; soil alkaline.

Pass over some sandy ridges, and camp on desert; little grass; should proceed to Pleasant Spring.

Pleasant Spring, (by direct route, four miles,)

as we travelled it; good water, abundance of grass, and cedar on the mountain side. Short-cut Pass; little grass; no water....

Water.

Grass.

APPENDIX C-Continued.

Return and best route from Short-cut Pass to Camp Floyd.

1.-Captain Simpson's trip from Fort Bridger to Camp Floyd, September 4 to 12, 1858.

Left Fort Bridger, September 4. During the day strong breeze from W.SW.

CAMP ON MUDDY CREEK.

September 4.-6 p. m., 61° W.SW., light air, sky cloudless, horizon hazy; 71⁄2 p. m., 37° E., very light air, sky clear, horizon hazy; 9 p. m., 361 SE., very light air, sky clear.

September 5.-5 a. m., 3410, calm, sky nine-tenths covered with light clouds.

It began to rain at 7 a. m.; heavy showers from 12 to 24 p. m.
All day strong breeze from SW.

CAMP ON THE FORKS OF SULPHUR CREEK.

September 5.-3 p. m., 56° W., light breeze, sky clear, no rain; 6 p. m., 49° W., light breeze, sky covered; showers of rain since 4. September 6.—53 a. m., 34° W., light air, sky covered. During the night, rain; the wind then changed to NE., and it began to snow. In the morning the snow covered the ground 1" deep. During the morning several short showers of rain or snow.

Water.

Grass.

CAMP ON BEAR RIVER.

September 6.-1 p. m., 384° N.NE., light air, sky covered, rain and snow; 3 p. m., 34° N., light air; snowing freely from 2 to 4; 6 p. m., 35° SW., light air, sky covered; 8 p. m., 38° S.SE., light air, sky covered thinly.

September 7.-6 a. m., 25° SE., light air, sky clear, some cumulus strat. in W.

CAMP ON WHITE CLAY CREEK.

September 7.-3 p. m., 4610 S., light air, sky half covered with cumulus; a shower of snow and rain just passed; 6 p. m., 39° N.NW., light breeze, sky six-tenths cumuli and cumulo-nimbus; 8 p. m., 3610 N.NW., light air, sky clear.

September 8.-6. a. m., 24° N.NE., very light air, sky clear.
A fine, clear, calm day, at 3 p. m. on the divide, 5510.

CAMP ON EAST FORK OF WEBER RIVER.

September 8.—6 p. m., 3940, calm, clear sky; 9 p. m., 2710 E., very light air, sky clear.

September 9.-6 a. m., 2110, calm and clear, a little white frost; at 31 p. m., 65° W., strong breeze, sky clear; on the divide, Parley's Park road.

CAMP ON KAMAS PRAIRIE.

September 9.-91 p. m., 34°, calm, clear sky.

September 10.-5 a. m., 2210, calm and clear, a little white frost; 7 a. m., 3510 calm, sky three-tenths cirro-stratus.

On the divide to Timpanogos river.-10 a. m. 66° SW., light breeze, sky clear.

CAMP ON ROUND PRAIRIE.

September 10.-3 p. m., 73°, calm and clear, some cirro-stratus on horizon; 9 p. m., 410, calm and clear.

2.-Capt. Simpson's exploration from Camp Floyd to Pass Short-cut, October 19 to 20, 1858.

CAMP ON MEADOW CREEK.

October 19.-4 p. m., 4430 N., light breeze, sky four-tenths cirrostratus; 6p. m., 250, calm and clear; 8 p. m., 1910 S., light air, clear.

October 20.-63 a. m., 13° S., very light air, a few cumuli.

CAMP ON THE HEAD OF CLOVER CREEK.

October 20.-2 p. m., 563°, calm and clear; 4 p. m., 51°, calm, sky four-fifths cum. strat. and cirro-stratus; 6 p. m., 391° NW., very light air, a few light clouds; 9 p. m., 3110, unchanged.

October 21.-61 a. m., 3010, calm and clear.