Sorry, I just want to correct the name of the author of The Complete Practical Distiller, it is M.L. Byrn, not F. Byrn. Again, it is available as a reprint from Raudins Publishing at the web address I mentioned. The other book mentioned in this thread by Drew, was written in the 1930's by a gentleman whose surname was Hirsch. I have seen it in bibliography lists and elsewhere (e.g. used book shop) but have not obtained a copy as yet, possibly it can be located on amazon.com through the author's surname. I think it is called Theory of Distillation, something like that. The name Hirsch is associated of course with the well-aged Michter's bourbons (Hirsch 16 and 20 year old) put out in the 90's and even more recently. The whiskey business being what it is, it would surprise me if the Hirsch of the distilling text was not an ancestor of the Hirsch who marketed those bottles.
The Hirsch who wrote the book did so as I say in the 1930's and I believe he was a professional engineer, as Sam Cecil is. No doubt many people who came out of Speed in Louisville (as Sam did, I believe, and I know Charlie DeSpain did) and other engineering faculties were looking to work or consult to the new distilleries being built or refitted in the 1930's after Volstead ended. Probably Hirsch's book has that genesis or something similar..