Front / Recto
- Title Demonstration
- Negative Date 1932
- Print Date 1932–35
- Medium Gelatin silver print
- Dimensions Image 11 5/8 × 9" (29.6 × 22.8 cm)
- Place Taken Moscow
- Credit Line Thomas Walther Collection. Gift of Shirley C. Burden, by exchange
- MoMA Accession Number 1825.2001
Back / Verso
- Mount Type No mount
Marks and Inscriptions
Stamped in black ink on sheet verso, center: фото РОДЧЕНКО .
 “Photo Rodchenko.”
The artist, Moscow; to Sovetskoe Foto, Moscow, 1930s ; to a private collection ; to Priska Pasquer, Photographic Art Consulting, Cologne, 1998 ; purchased by Thomas Walther, June 22, 1998 ; purchased by The Museum of Modern Art, New York, 2001.
 MacGill/Walther 2001(3), p. 18; and Priska Pasquer, Photographic Art Consulting invoice, June 22, 1998.
 Pasquer invoice.
 Ibid.; and Pasquer, letter to Maria Morris Hambourg, October 28, 2013.
 Pasquer, letter to Hambourg; MacGill/Walther 2000(2), p. 51; and Pasquer invoice.
- Format Metric
- Weight Double weight
- Thickness (mm) 0.28
- UV Fluorescence Recto negative Verso negative
- Fiber Analysis Softwood bleached sulfite 98% Hardwood bleached sulfite 2%
- Material Techniques Developing-out paper
This work was determined to be a gelatin silver print via X-ray fluorescence (XRF) spectrometry.
The following elements have been positively identified in the work, through XRF readings taken from its recto and verso (or from the mount, where the verso was not accessible):
- Recto: P, S, Ca, Zn, Br, Sr, Ag, Ba, Pb
- Verso: Al, S, K, Ca, Fe, Zn, Sr, Ba, Pb
The graphs below show XRF spectra for three areas on the print: two of the recto—from areas of maximum and minimum image density (Dmax and Dmin)—and one of the verso or mount. The background spectrum represents the contribution of the XRF instrument itself. The first graph shows elements identified through the presence of their characteristic peaks in the lower energy range (0 to 8 keV). The second graph shows elements identified through the presence of their characteristic peaks in the higher energy range (8 to 40 keV).