Public library's card catalog and books linked by scent

In 1974, Upper Arlington, Ohio public library launched a program to link their card catalog and shelved books by odor. The project was called: "Stick Your Nose in the Card Catalog." From Weird Universe:

The idea was that the card in the catalog would have a scent, and then the book on the shelf would have a matching scent. So you could find your books by smell. There were about 60 scents in total, including apple, chocolate, garlic, lemon, roses, root beer, leather, pizza, orange, strawberry, candles, pine, cheddar cheese, clover, and smoke.

The library says that they "aren't sure what exactly happened to the scented catalog, but we guess that the cards eventually lost their scent over time, but remained part of the catalog until it was decommissioned" for a digital system in 1989. Read the rest

This Historic Book Odour Wheel pinpoints scent of ancient tomes

The smell of old books is instantly recognizable but hard to describe. Thanks to mass spectrometry and good old fashioned smell tests, University College London researchers have created a Historic Book Odour Wheel. Read the rest

Where does "new car smell" come from?

The answer lies in another question. How can PVC — polyvinyl chloride, a commonly used type of plastic — be the stuff that makes tough, rigid sewer pipes and, simultaneously, be the stuff that makes floppy vinyl signs and cheap Goth pants?

"PVC is hard stuff. But if you put in a lot of plasticizer, you can get it to be soft," explains John Pojman, a chemistry professor at Louisiana State University. At a molecular level, PVC is a dense thing. Imagine a slinky in its stiff, compressed state. The plasticizers are chemical compounds derived from coal tar. Mix them with PVC and the small molecules of plasticizer shove their in between the densely packed PVC molecules. Imagine stretching the slinky out so that its coils are now wobbly. Same thing happens here. The more plasticizer you add, the less rigid the PVC.

And it's the plasticizers that produce that smell — the one we associate with the vinyl interior of a new car.

Image: 365:37 - Mar 29 - that new car smell, a Creative Commons Attribution Non-Commercial No-Derivative-Works (2.0) image from waldengirl's photostream

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