In 1919, Marcel Duchamp, sent, as a gift to his sister Suzanne instructions to place a geometry textbook on her balcony. Suzanne affixed the book to her Paris balcony using wire. The only remnants of the project are a painting she composed in 1920. Duchamp later said of the project "The wind had to go through the book, choose its own problems, turn and tear out the pages… It amused me to bring the idea of happy and unhappy into readymades, and then the rain, the wind, the pages flying, it was an amusing idea."

The Mount Diablo Unhappy Readymade is a project that took place on Mount Diablo in California from 2012-2015. A ring of metal wire was inserted through the pages of the book "New Solid Geometry" (1938) and it was hung by a hemp string to a branch of a Blue Oak tree. The book was documented over the course of its stay (40 months).

The project has several concerns. What are the effects of time, wind, rain, and sun on a book? Why Unhappiness? Are the effects of time and degradation, necessarily unhappy? If a book is a form of coherent memories, what does it "look" like to lose them, to lose a sequence, to move from rational assemblage to irrational entropy? What is the experience of a ritual based on the visitation of an object, an object who is consistently transitioning to new forms?

October 2012: Early uses of solid geometry.

October 2012: Early uses of solid geometry.

October 2012: Early uses of solid geometry.

October 2012: Early uses of solid geometry.

November 2012: Figures of solid geometry.

November 2012: Figures of solid geometry.

November 2012: Figures of solid geometry.

November 2012: Figures of solid geometry.

December 2012: The axioms and postulates of plane geometry.

December 2012: The axioms and postulates of plane geometry.

December 2012: The axioms and postulates of plane geometry.

December 2012: The axioms and postulates of plane geometry.

January 2013: Exact definition of a plane.

January 2013: Exact definition of a plane.

January 2013: Exact definition of a plane.

January 2013: Exact definition of a plane.

February 2013: The Use of the Word "Determine".

February 2013: The Use of the Word "Determine".

February 2013: The Use of the Word "Determine".

February 2013: The Use of the Word "Determine".

March 2013: How a plane is determined.

March 2013: How a plane is determined.

March 2013: How a plane is determined.

March 2013: How a plane is determined.

April 2013: Postulate 20. (1) A straight line and an outside point determine a plane. (2) Three non-collinear points determine a plane. (3) Two intersecting lines determine a plane.

April 2013: Postulate 20. (1) A straight line and an outside point determine a plane. (2) Three non-collinear points determine a plane. (3) Two intersecting lines determine a plane.

April 2013: Postulate 20. (1) A straight line and an outside point determine a plane. (2) Three non-collinear points determine a plane. (3) Two intersecting lines determine a plane.

May 2013: Points that lie on the same straight line are said to be collinear. Points that lie on the same plane are said to be coplanar.

May 2013: Points that lie on the same straight line are said to be collinear. Points that lie on the same plane are said to be coplanar.

May 2013: Points that lie on the same straight line are said to be collinear. Points that lie on the same plane are said to be coplanar.

June 2013: Intersection.

June 2013: Intersection.

June 2013: Intersection.

June 2013: Intersection.

July 2013: Postulate 21. If two planes intersect, they have at least two points in common.

July 2013: Postulate 21. If two planes intersect, they have at least two points in common.

July 2013: Postulate 21. If two planes intersect, they have at least two points in common.

July 2013: Postulate 21. If two planes intersect, they have at least two points in common.

August 2013: The Intersection of two lines.

August 2013: The Intersection of two lines.

August 2013: The Intersection of two lines.

September 2013: A line perpendicular to a plane.

September 2013: A line perpendicular to a plane.

September 2013: A line perpendicular to a plane.

September 2013: A line perpendicular to a plane.

October 2013: If a line is perpendicular to each of two intersecting lines at their point of intersection, it is perpendicular to the plane according to the lines.

October 2013: If a line is perpendicular to each of two intersecting lines at their point of intersection, it is perpendicular to the plane according to the lines.

October 2013: If a line is perpendicular to each of two intersecting lines at their point of intersection, it is perpendicular to the plane according to the lines.

November 2013: Corollary 1. A plane can be drawn perpendicular to a given line at a given point on the line.

November 2013: Corollary 1. A plane can be drawn perpendicular to a given line at a given point on the line.

November 2013: Corollary 1. A plane can be drawn perpendicular to a given line at a given point on the line.

December 2013: Corollary 2. Only one plane can be drawn perpendicular to a given line at a given point of the line.

December 2013: Corollary 2. Only one plane can be drawn perpendicular to a given line at a given point of the line.

December 2013: Corollary 2. Only one plane can be drawn perpendicular to a given line at a given point of the line.

January 2014: Corollary 3. A plane can be drawn perpendicular to a given line on a given point not in the line.

January 2014: Corollary 3. A plane can be drawn perpendicular to a given line on a given point not in the line.

January 2014: Corollary 3. A plane can be drawn perpendicular to a given line on a given point not in the line.

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