1955. Figure 1. A homemade observation mask has proved useful for aerial forest insect detection surveys. It consists of a headgear, such as those used to hold laboratory safety face shields, fitted with a face piece of amber vinylite.
Figure 1. A homemade observation mask has proved useful for aerial forest insect detection surveys. It consists of a headgear, such as those used to hold laboratory safety face shields, fitted with a face piece of amber vinylite.
The photograph is Figure 1 from: Heller, R.C. and R.C. Aldrich. July 1955. Observation Masks for Aerial Spotting of Insect Damaged Trees. USDA Forest Service. Beltsville Forest Insect Laboratory. Washington, D.C.
Photo by: R.C. Heller and R.C. Aldrich
Date: July 1955
Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection
For additional historic forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site: wfiwc.org/content/history-and-resources
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
1955. Figure 1. A homemade observation mask has proved useful for aerial forest insect detection surveys. It consists of a headgear, such as those used to hold laboratory safety face shields, fitted with a face piece of amber vinylite.
Figure 1. A homemade observation mask has proved useful for aerial forest insect detection surveys. It consists of a headgear, such as those used to hold laboratory safety face shields, fitted with a face piece of amber vinylite.
The photograph is Figure 1 from: Heller, R.C. and R.C. Aldrich. July 1955. Observation Masks for Aerial Spotting of Insect Damaged Trees. USDA Forest Service. Beltsville Forest Insect Laboratory. Washington, D.C.
Photo by: R.C. Heller and R.C. Aldrich
Date: July 1955
Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program collection
For additional historic forest entomology photos, stories, and resources see the Western Forest Insect Work Conference site: wfiwc.org/content/history-and-resources
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth