IIIF for Educators

On Death and Dyeing in SoCal

click to copy lesson html Students are introduced to the practice of "Ekphrasis" to practice "reading" an image/photograph.

On Death and Dyeing in SoCal

💡 Concept

There are few things more obviously dead than a tray of birds at Occidental College's Moore Laboratory of Zoology. Pressed in tightly on their backs, each with a tag tied to its foot, they stare blankly with white cotton stuffing in place of eyes. Flesh and bones have been removed, and what is left is called a skin.

Tray of bird specimens from Occidental College Moore Laboratory of Zoology

Along with the Getty Research Institute, Occidental College has served as an intellectual and geographic nodal point in scholarship on the Florentine Codex, most notably in the July, 2020 issue of Ethnohistory. Like the Florentine Codex itself centuries before, it is the product of a multi-talented team of collaborators during a raging epidemic. Volume 67, Number 5 contains series of articles that connect Los Angeles regional scholars and scientists around overlapping expertise in dead birds and their significance in Nahua society, culture, and history. You have been assigned to read one, "The Living Feather: Tonalli in Nahua Featherwork Production," by Allison Caplan, Assistant Professor of the History of Art at Yale University, and previously at U.C. Santa Barbara, History of Art & Architecture. In it, Caplan describes the Nahua concept of "tonalli," which is a marker of vitality that distinguishes living things from inanimate organic substances, as a quality related to the play of sunlight on some surfaces, even that of some dead birds:

"As understood by Nahuas, tonalli was an animating force diffused by the sun’s rays, which adhered in humans, animals, plants, and particular, highly valued materials and objects of adornment and consumption. Derived from the verb tona, to shine or give off heat, tonalli literally means, “that which has been shined,” and shares the same root as the term for the sun and solar god, tonatiuh."

Cover of Ethnohistory Journal, with images from the Florentine Codex  Front page of the Digital Florentine Codex site

🖥️ Activity

This lab activity will supplement your reading by drawing you more directly into some of the regional knowledge that informed Caplan's writing on Tonalli. First, you will view a few examples of birds from the Moore Lab of Zoology collections at Occidental College. Curator John McCormack, student Josh Medina, and Professor Lisa Sousa and others at Occidental collaborated with Caplan on the Ethnohistory issue, and/or the Digital Florentine Codex project, contributing materials and expertise about birds and feathers. Second, you will read and search within the Digital Florentine Codex following Caplan's lead with featherwork and "tonalli."

📍 Location

Retracing the path of collaboration during the heady ferment leading to the publication of Ethnohistory 67(5) and launch of the Digital Florentine Codex might take you a few hours by car, depending upon traffic. But compare it to the extensive routes of trade and tribute that brought glimmering bird bits to Tenochtitlan!

👓 Examples

Oxy '19 undergraduate Josh Medina worked with the Moore Lab to develop methods for 3D scanning Mexican and Central American bird specimens, using photogrammetry, a process using high-resolution photographs. He established a pipeline for collections specimens to be posted and viewable in 3D on Sketchfab. Below are two examples that exhibit the quality of "tonalli." In his scanning efforts, Medina underscored the technical challenge in photogrammetry of rendering iridescence, a shimmering color effect characteristic of hummingbirds and some other birds that is achieved not through pigmentation, but selective refraction and reflection of certain color spectra in light.

Shimmering bird skin with cotton eyes from Moore Lab of Zoology

Josh Medina demonstrates his process for photogrammetric scans of bird skins Colorful bird on a stand next to a ruler to show its size

Violet-capped Hummingbird - Goldmania violiceps by MooreLab on Sketchfab

Roseate Spoonbill - Platalea ajaja by MooreLab on Sketchfab

🧱 Materials

Digital Florentine Codex site

Digital Florentine Codex
The "FloCo" site is also embedded here for your convenience, but you are encouraged to link out to the site for best reading and viewing  (click to open and close)

🧱 Materials

🪜 Steps

Part 1: Read the Florentine Codex

Read from the Digital Florentine Codex (Click to open)
  1. Open the GRI Digital Florentine Codex site
  2. Read and view images from Book 9 The Merchants (pre-loaded above) pages 56v - 66v (about the feather working process)
  3. Search for "tonalli" and explore both images and texts from the results
  4. As you explore, think of items you might want to use for the second part of the activity

Part 2: Pay Tribute

Crop and share tonalli  (Click to open)
  1. Once you have an idea of which item details you would like to share, make note of the book and approximate folio location (folio is a different way of numbering pages; it is a sheet of paper in a book that has two pages, one on each side)
  2. Open the Materials section in this Lab Activity, and copy the Manifest URL for the book you are using
  3. Paste the IIIF manifest URL of the book into the top bar of the Cropping Tool, and click SUBMIT
  4. Scroll, select and click any thumbnail to load in the viewer
  5. Zoom and view the item page 
  6. To crop a detail from the image, click the white pencil icon, and highlight the desired portion by clicking and dragging a rectangle from corner to corner
  7. A thumbnail of your selected detail will appear in a slider at the bottom of the Cropping Tool. You can repeat to collect multiple details.
  8. Click on the thumbnail of any detail to generate an image URL or HTML embed code, which you can choose, by clicking their respective buttons. Select Actual if you want the detail to be as big as you see it, or Full if you want it to fill the screen. 
  9. Click Copy to copy the Image URL

✉️ Share

Submit your post (Click to open)
  1. to create your post, click Reply at the bottom of the screen, and a text editor will appear for you to compose your post
  2. to enter your image details, click the scenery icon for "images" near the center in the text editing toolbar
  3. in the Upload Image popup, select URL, and paste your URL in the File URL blank. Briefly describe your image detail for Alt Text (for the visually impaired), and click Submit.
  4. repeat for additional images 
  5. once you have all your details in place, you can adjust their size by clicking on each image, opening the Image Options, and adjusting the width or height of each image to make them align with each other to create the exquisite crops effect
  6. If you would like to rotate any of your images, change the /0/ portion near the end of the URL (e.g. /90/ or /180/ or /270/

Please add a brief (approx. 30-40 words) statement, including:

  • As a first foray into the Digital Florentine Codex, search for the term "tonalli" and discover the range of places this Nahuatl term appears. Pick one of the pages to explore and crop the text and/or image you have selected. Using Caplan's article as a resources, what aspects of "tonalli" are captured in your particular selection?

Post by [date and time]

🤝 Collaborate

View submissions by your peers (Click to open)

Please take some time, once you have posted, to scroll through, look at, and read the submissions of your classmates. Comment on posts that you find interesting and that reveal the complexity of this Nahua concept.

Interact by [date and time]

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