Forest Service

Documentation for a snow study by Lyle Watts in a national forest in Idaho showing that most of the snow has melted. The back of the photo reads, "4/20/31 - SR - 5.-Snow banks remain only on N Side of trees. Bright Sun S16 -T1/10 direction E Vericrome [sic.] film 4PM."

Documentation for a snow study by Lyle Watts in a national forest in Idaho showing nearly all the snow has melted in this part of the forest. The back of the photo reads, " From Corner #2 - SR-3. 3rd of series. 4/20/31 - 3PM. Bright Sun. S-16-T1/5 Face - West."

Forester Charles Connoughton Sits on the Running Board of a Car at Rock Flat. This photo was taken while Lyle Watts was documenting the forest probably on the Montana Idaho border. The back of the photo reads, "5/2/28 - 4PM. 8-1/35 South. - Dull Sun Car and Connoughton on Rock Flat."

Forest Documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing a closeup of a snow covered sage. He uses a pencil to point to what he is showing in the snow. Back of photo reads, "4/8/31 - 215PM Bright Sun 8-1/100 - Sage - Snow melting - Just tip of sage shows above snow melt granulated snow & honeycomb agoung sage."

Forest documentation by Lyle Watts in hazy sun at 11:00 A.M. for a survey study probably on the Montana-Idaho border at Rock Flat showing snow at the base of several trees and among undergrowth. This is the same site photographed in photo 2009-2917. The back of the photo reads, "4/2/31-11A. 16-1/25s. West. Hazy sun."

Forest documentation by Lyle Watts at 11:A.M. in the first of a series for a survey study probably on the Montana-Idaho border at Rock Flat showing snow at the base of several trees and undergrowth. This is the same site as photo 2009-2016 but with different shutter speed. The back of the photo reads, " 4/2/31 - 11 A.M. 8-1/50s SR -3- 1st of series from this location. MY Private Reprod."

Forest documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing snow among the trees. The back of the photo reads, "4/2/31 - 11:30 A.M. - 8-1/75 - West. Bright Sun. SR. 3 corner 2. 1st of a series. Snow under advance growth under OM."

Forest documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing posts in snow with trees off in the distance. The reverse of the photo reads, "4/2/31 - 10 AM. Hazy Sun. 16 - 1/25."

Forest documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing patches of snow among tall trees. The back of the photo reads, "4/8/31 - 1PM Stop 11 Shutter 1/25 sec West. Timber courses [illegible] patches in snow cond."

Forest Documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing a closeup of snow melting from sage. Back of photo reads, "4/3/31 200 PM Bright 8-1/75 Sage snow melting - note granulation & honeycomb."