Show purse from sow s ear A feature of the exhibit of arthur D little inc at the national exposition of chemical industries dus tries in 1921 was a silk purse actually made out of a sows bows ear the ear was made into glue softened with water brought almost to the point of precipitation with acetone then forced through a warm container into a spin spinneret nere t and through this into a hardening solution of formaldehyde and acetone in a V tube it was picked P out ut of the V tube reeled dried treated to a 40 per cent glycerin i bath in which it was also d dyed then reeled and dried again woven and sewed up |