Forest Service

Snow survey at Bear Basin, possibly near McCall, Idaho. Back of the photo reads, "Bear Basin Snow Survey Course 16 - 1/10 Face North Dull Sun 4:30pm 4/2/31."

Forest Documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing a snow covered opening between the trees in the forest. The back of the photo reads, "SR - 3 one of series Hazy sun 4/8/31 240PM 5.6 - 1/25 sec."

Forester identified only as "C.A.C." at Bear Bason Course, possibly near McCall, Idaho.

Forest Documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing weather equipment, including an anemometer(left)to measure wind speed, in use in the forest. Back of photo reads, "SR3-Set up. 240pm - 4/8/31 Stop - 16 - Time 1/5s [illegible] West Hazy sun."

Documentation for a snow study by Lyle Watts showing a forest with most of the snow melted. Back of the photo reads, "4/28/31 - 10AM MC -2- Idaho From P-1-Face SW Joins picture #12 - S-16-T.1/10 Bright Sun." "Picture #12" in Mr. Watts numbering is Photo 2009-2940.

Documentation for a snow study by Lyle Watts in a national forest in Idaho showing two patches of melted snow. Each has a stick lying horizontally across it. This are possibly yardsticks to show the amount of snow melt that has taken place. The back of the photo reads, " 4/29/31 - 2.00 PM Stop. 5.6 Time 1/150s - East. Verichrome - Bright sun Snow - Dirt. Temperatures. Snow Recession Study." This photo is similar to 2009-2935.

Photo of fenced snowy field along gravel or dirt road near Snowville, Utah, which is near the Montana border. Back of the photo reads, "Only snow remaining is on bare ground - prepared for fall wheat - no snow on stubble fields. Taken near Snowville notch on 3/16/31."

Documentation for a snow study by Lyle Watts in a national forest in Idaho. Snow has receded in the open areas. Back of photo reads, "4/20/31 2/30PM - SR3-3rd of series Stop 16 T1/5s.-Verichrome."

An unidentified forester stands among tall trees in a national forest, as a point of reference. There is the beginning of a shelter on the left. The back of the photo reads, "4/20/31 - 1 30 pm face N. - Stop .16 - Time 1/25 SR-4-Station 5-3 -3rd of a series." This is apparently part of the snow studies in Idaho.

Documentation for snow survey by Lyle Watts at Rubicon, Idaho. Back of photo reads, "Rubicon Snow Picture 4/19/31. note - Snow in [illegible] and none in open - There was absolutely no snow left except in such places as this dale."