This page lists several ATT publications and has a link to a 1953 publication that could fit your description (and could have been a subsequent editini).
Otherwise, maybe you'd recognize the name as one of the other publications?
Otherwise, maybe you'd recognize the name as one of the other publications?
I was just blown away they send you all that material for free by simply applying. This would have been before the internet was big, so probably isn't as exciting now.
Edited for emphasis.
It was a hangover from their days a quasi-socialist, monopolistic enterprise ("We're the Phone Company"), when they could afford to be "inefficient" in that way -- scare quotes because it's difficult to calculate the cost of preparation and dissemination against all the high-value careers the material may have inspired. These days, an accountant would glance at the cost and cut it out without thinking twice.
https://archive.org/details/principlesofelec0000unse_a3j0
(AA can be searched using an archive.org file slug, e.g. "principles...a3j0", or obviously by using the title)
Not the same thing but a comment on what things were like back in the day.
Later that day I wrote the company just to let them know, thinking if others had similar issues they could investigate.
They wrote me back saying it's impossible their packs would have bones in them, and it's possible my own tooth broke/chipped and that's what I was biting, and attached a coupon for something like 35 cents off one pack.
I found the reply to be really bizarre - I'd probably rather they not responded at all.
Actually, it's happened twice, as about 15 years after that I had a bad cavity and fracture in a forward molar, and a few days before a scheduled root canal it happened again, but this time I suspected what had happened as soon as I encountered something hard all of a sudden while chewing something that shouldn't really have bits as hard as that in it.
Which is to say, their response that perhaps it was your own tooth may not have been as out of left field as you might have thought. It's probably a somewhat common occurrence.