Friday, October 30, 2015

New Accessions: David J. Sahn, M.D. Slide Collection

It’s been two weeks since my last blog post!  Unacceptable, I say.  So I am here on this cool and blustery Friday to provide not one, but two glimpses into our new accessions.

The first new accession I want to bring to your attention to is from Dr. David J. Sahn in Pediatric Cardiology, who donated his glass slides and 35mm slides that he used in teaching and instruction.  The glass slides themselves are a collection of slides from the National Institutes of Health, and slides created at UCSD.  Together these slides of different origins form the lecture components used by Dr. Sahn in teaching.

Slide catalog?
As we have discussed previously, glass slides were a common way of projecting images for classroom instruction.  This format was popular until the invention of the 35mm slide which was much, much lighter, more resistant to damage (glass slides are notorious for breaking, cracking, chipping), and easier to create (therefore easier to get new slides, or swap out one slide for another in updating a presentation).

Dr. Sahn completed his medical degree at Yale in 1969 and is an expert in cardiac imaging and cardiac diagnosis.  He currently heads the Clinical Care Center for Congenital Heart Disease and Referrals.  More information on his Provider page here:

NIH Slide
I also acquired several audio tapes of lectures, which I hope to migrate to electronic form in the near future.

NIH Slide
The glass slides were transferred to us in these nifty wooden cases of which there are four.  Each case had three drawers and strongly reminded me of a library card catalog in their design and use.  Unfortunately, many of the slides were cracked or came to us slightly damaged.  Regardless, the information contained on the slides is still readable.

Front view of the Slide Catalog
In terms of preservation, the 35mm slides will be re-housed in archival quality binder sheets that holder about 20 slides each.  The glass will be rehoused in unbuffered archival paper sleeves and placed in archival shoe boxes (no shoes were ever in these boxes, but the shape is awfully similar).  The main difference with storing glass slides versus other photographic mediums is that boxes with glass slides cannot (or should not) have other materials stacked on top of them, due to the weight and the potential for further damage.
Example of the 35mm slides
Hopefully, I get a chance to post another article today.  I am sure I will, so stay-tuned!

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