r without 2 oe feuille and Chappuis announced that they had liquefied ozone. NOVEL WINDOW SCREEN. loss, and the butter produced will be of a uniform quality. These chemists have been able to ozonize oxygen toa greater The engraving shows an extensible window screen that Besides the features already… … JOSEPH’S WINDOW SCREEN. a much more extended range of temperature and pressure on the part of the inventor, and it possesses points of novelty than that of more complex structure. Under special physi- and usefulness that will be understood and appreciated by is little if any more expensive than…
Internet Archive · Public domain (published before 1931). Free to use for anything.
