For five months in 2006 I meticulously recorded the weight of everything that passed into and out of my studio, carefully annotating each measurement: lunch & box of nails IN; full bladder OUT; empty bladder IN; stepladder OUT; etc.

The results of this study were published in the hypothetical Journal of Tangible Intuitions (Volume 8, No. 3, March 2008).

An 8-page offset reprint of this article is available from my online store. It includes the complete text of that article, including Figure 1, a 9″×50″ full-color accordion-fold chart that reveals (?) the meaning latent in the raw observations.