ths’ forms the subject of a recent patent. The box has experimentation with various tannins in order to ascer- the general form of an ordinary sewing machine cover, tain which is most effective in preventing the incrusta- but its top is cut away to form slots at the ends, open- tion of boilers,… … bottom of the mortise, rubber springs being placed ROBERTSON’S SEWING MACHINE COVER AND STOOL, ALEXANDER’S LOCOMOTIVE ATTACHMENT. upon opposite sides of the tenons. The position of these springs, and the oscillating motion of the top of comes. There is a spring-actuated catch -for re- ends. The…
Internet Archive · Public domain (published before 1931). Free to use for anything.
