the middle ages to modern times the magic of chemistry has fascinated mankind and to the boy of today the subject is even more exciting for this is the age of industrial chemistry vastly widened application of chemical research in manufacturing it has attained importance of just a few years ago all around us are the products of modern chemistry window shades draperies upholstery and furniture all are made of all covered with something that came out of a test tube radio cabinets tabletops and of trees and plants would you believe that the leftover from the seeds is used to make the material which forms the backs of mirrors combs and brushes only see through a chemical process is turned into something much prettier than i ever ate that can be made in all the colors of the rainbow but unlike natural  material won't crack or discolor with age chemistry is responsible too for the government like threads of these new stockings by a miracle of modern science such commonplace things as cold water and air have been transformed into a thread small elastic themselves spun from filament even finer than those of a spider's web yet many times a strong brain chemistry to the rescue something that came out of a test to which is going to protect her from that hour here folded into a  package is a transparent raincoat rain proof like rubber from other chemical processes come refrigerants that keep food fresh wrap things that keep things clean insulation and wallboard to improve our buildings nature constantly wears away its own left to themselves materials eventually decay the pitted side of a rock the rotting wood of a fence post and the rusting odds and ends in the neighborhood junkyard all bear testimony to the destructive process of air wind and water clear patrons needle the famous egyptian are burlesque in central park new york is century it's all over all these years nature's forces have attacked the storm but now it has been sprayed with a finish that will preserve the famous stone pillar for centuries to come chemistry has also taken a hand in the preservation of wood in this great laboratory at madison wisconsin the united states forest service has conducted more than half a million experiments not only to find you and other natural products made better by chemistry is rubber years of research where necessary in order to improve the product and then testing in great machines subjecting it to terrific punishment today rather products are tougher and stronger and have a longer life longer life has been given the gasoline engine to four years engineers were puzzled when certain engine parts like piston pins and valve stems became corroded and prematurely one of the engineers called upon the chemists who trace the corrosion to so if you like acid fumes formed in the engine as a result of their studies this ventilating system was developed to draw a clean air through the engine carrying off the harmful fumes and giving our automobiles a longer useful  prevention of rust is another concern of the industrial chemist here we see what happens when an ordinary nail is left outdoors for a long period as time goes on the iron returns to its natural form iron you and me studies of the action of rust by means of microscopic photography and many experiments resulted in the development of rust proofing operations for metals bodies for instance are sprayed with a chemical that helps the metal to resist the elements bodies and fenders are created so they will resist the action of moisture and then there's the surface finish of the automobile subjected to all kinds of weather too much water and sand to suck them smoke from city chimneys which cover the surface with a film of gritty scratching particles snow rain or sleet do their best to dull the gloss and even in clear weather there's always the gentle do another enemy of the finish but chemical research has developed a finish to resist such attacks panels of metal covered with different types of finish are constantly tested in special machines thirty hours in this machine under strong outro violet rays is equal to  solid year under the burning rays about tropical sun now the test panels are placed in the weather ometer here they are subjected to another ultraviolet rays predicament under intense heat the machine revolves hour after hour and each test panel gets a bath with every revolution as well as intense like and heat from the heat of the weather  panels go into the sub freezing temperature of a special refrigerator then the finish on each panel is examined constant experiment has shown which finishes are the best and the result of years of patient chemical research is the surface finish used on today's most modern cars come pining with its protective qualities the radiance of sparkling colors the automobile of today is a thing of beauty yes chemistry has changed the world we live in from well deep in the ground from the mind the and the palm the materials which are being transformed into all manner of new products great things have been done but much more remains to be accomplished some young man perhaps one watching this very picture may develop a startling new formula from a test tube experiment may give the world finer things to use to play to better man's