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Ayres, H. B. (Horace Beemer), 1856-

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California, Mt. Lyell quadrangle : land classification and density of standing timber / U.S. Geological Survey ; Henry Gannett, geographer in charge ; land classification by R.B. Marshall
California, Mt. Lyell quadrangle : land classification and density of standing timber / U.S. Geological Survey ; Henry Gannett, geographer in charge ; land classification by R.B. Marshall

Pine region of Minnesota : showing classification of lands / by H.B. Ayres ; compiled under the direction of Henry Gannett
Pine region of Minnesota : showing classification of lands / by H.B. Ayres ; compiled under the direction of Henry Gannett

Lewis and Clark Forest Reserve, Montana, showing classification of lands / prepared under the direction of Henry Gannett, geographer in charge, by H.B. Ayres
Lewis and Clark Forest Reserve, Montana, showing classification of lands / prepared under the direction of Henry Gannett, geographer in charge, by H.B. Ayres

Map of Washington Forest Reserve, showing wooded, burned and restocked areas and the density of merchantable timber, in feet B.M.
Map of Washington Forest Reserve, showing wooded, burned and restocked areas and the density of merchantable timber, in feet B.M.