Yes, this is an excerpt from Meldola, et.al./1917. However, this is the only reference in the article as to procedure, and it's vague at best, as it only refers to "digesting" but no there is no further mention regarding temperature or time. A Kodak patent refers to a German one, in which it is outlined how to produce glycin, but I've had no luck finding it - it is German Patent 383,190, abstracted in Chemisches Zentralblatt, vol. 24, part I, page 1592. It refers also to an article by L. Galatis in Helvetica Chimica Acta 4, 574-9, (1921), which I don't have.
PhotoJim, I will in fact be purchasing glycin, regardless of whether I succeed or fail in its synth, which more or less a proof of concept I'm interested in. I was referenced to dealers in Europe who offer glycin at acceptable prices. I don't know yet....