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Keuffel

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This alidade consists of straightedges with a rigidly-mounted telescope that can be rotated through the vertical angle 30. The telescope is set on a high standard or post (4 inches in height) to raise it above the table. The telescope for the high standard is 16 power, inverting type with internal ...
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High Standard Alidade
This alidade consists of straightedges with a rigidly-mounted telescope that can be rotated through the vertical angle 30. The telescope is set on a high standard or post (4 inches in height) to raise it above the table. The telescope for the high standard is 16 power, inverting type with internal ...
Location: USA
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This is a telescopic alidade in which a pendulum device, or compensator replaces the conventional bubble for establishing a horizontal reference line from which vertical angles may be measured. Alidades were the primary mapping instrument in the U.S. from about 1865 to the 1980s, when they were repl...
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Pendulum Self-leveling Alidade
This is a telescopic alidade in which a pendulum device, or compensator replaces the conventional bubble for establishing a horizontal reference line from which vertical angles may be measured. Alidades were the primary mapping instrument in the U.S. from about 1865 to the 1980s, when they were repl...
Location: USA
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Manufactured by Keuffel & Esser, New York & New Jersey. In this type of alidade, as opposed to the high standard, the telescope mounted close to the straightedge, producing a more compact instrument. A right-angle prism is attached to the eyepiece and permits viewing by looking down. A cylindrical b...
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Explorer's Alidade
Manufactured by Keuffel & Esser, New York & New Jersey. In this type of alidade, as opposed to the high standard, the telescope mounted close to the straightedge, producing a more compact instrument. A right-angle prism is attached to the eyepiece and permits viewing by looking down. A cylindrical b...
Location: USA
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A high standard alidade; this type of alidade permits direct viewing through the telescope. The level is mounted below the inverting telescope and the base (blade) is solid brass with circular voids. Manufactured by Keuffel & Esser, New York & New Jersey.
Object ID: USGS-000165...
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Telescopic Alidade
A high standard alidade; this type of alidade permits direct viewing through the telescope. The level is mounted below the inverting telescope and the base (blade) is solid brass with circular voids. Manufactured by Keuffel & Esser, New York & New Jersey. Object ID: USGS-000165...
Location: USA
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This instrument was manufactured by Keuffel & Esser Company, New York & New Jersey, serial #2300. Stadia Hand Transits are made of up a small telescope with cross and stadia hairs and a circular box which serves as either a magnetic compass or clinometer. The company sold these instruments from 1910...
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Stadia Hand Transit with Case
This instrument was manufactured by Keuffel & Esser Company, New York & New Jersey, serial #2300. Stadia Hand Transits are made of up a small telescope with cross and stadia hairs and a circular box which serves as either a magnetic compass or clinometer. The company sold these instruments from 1910...
Location: USA
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Original Box & Booklets. Marketed as being made of Ivorite, this slide rule was manufactured by Keuffel & Esser Company, New York & New Jersey in the 1960s. All slide rules consist of three parts (the stock, the slide and the cursor or indicator) and have logarithmic scales that can be moved in rela...
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Mannheim Type Slide Rule with Leather Sleeve
Original Box & Booklets. Marketed as being made of Ivorite, this slide rule was manufactured by Keuffel & Esser Company, New York & New Jersey in the 1960s. All slide rules consist of three parts (the stock, the slide and the cursor or indicator) and have logarithmic scales that can be moved in rela...
Location: USA
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