Glass slides of unknown engineering works

[youngtug]

The castings are die cast. I would think the fettling done was to remove the extra bits of the casting and sharp edges, that is what we have always called fettling, maybe also polish it off a bit. Such as in the photo of the women using the abrasive disc. Hopefully there was no vibration on the milling machine, although I have seen the result of "chatter"

[youngtug]

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[youngtug]

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[Wiggy]

I'm interested to know

- why were they taking photos by that method in those years??     

Wiggy

[ronwoods]

I had exactly the same thought, Wiggy.  I'd have expected something like 35 mm slides by WWII, although I believe glass slides were used in some movie theatres until at least the 1960s and possibly later.  I think the dress of the women (in particular) is more like 1940s than earlier or later eras.

(It's also interesting to note the minimal safety equipment and protective clothing compared to what would be found in a similar plant today.)

Regards, Ron

[youngtug]

I think that it was a little early for 35mm slides. These are lecture slides by the look of them, apart from the ones I have posted there are several showing the molecular structure of different stages of the metal and also some of the parts. Three and a quarter inches by three and a quarter inches [3&1/4" x 3&1/4"] square glass slides was a common format of slides used for lectures etc, in the UK  a lot later than the date of these.

[youngtug]

More

[youngtug]

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[youngtug]

Not the best footwear for the job in that last photo.