Well, not knowing much about the manufacture of sausages, I would not know if it is erroneous or not.
Is there something, still in print, that actually does the job this book intends to do accurately? I I am sure a lot of members would be interested in acquiring such a work.
Or a first edition of "The Sausage" by Parson Snows? Someting to occupy your spare time!
Regards,