MAKE A MEME View Large Image AbneyLevel.JPG Abney level or Inclinometer made by Eugene Dietzgen Company of Chicago circa 1936 serial number 22098 The scale is reversible As shown in the photo it is set for measuring percent grade The reverse measures degrees of arc ...
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Keywords: AbneyLevel.JPG Abney level or Inclinometer made by Eugene Dietzgen Company of Chicago circa 1936 serial number 22098 The scale is reversible As shown in the photo it is set for measuring percent grade The reverse measures degrees of arc 2014-07-06 14 17 14 own Douglas W Jones cc-zero Uploaded with UploadWizard Inclinometers Surveying levels Location not applicable
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