AN INDIVIDUAL KIPP GENERATOR W. WESTWATER, UNIVERSITY OP NEBEASKA, LINCOLN, NEBRASKA Practically every instructor of qualitative analysis has, a t some time or other, designed a substitute for a Kipp gas generator for individual use. I am not an exception to the rule and hence I submit another which is practical for the following reasons. 1. It can be easily constructed by first-year students. 2. The cost of materials is low. 3. The reacting materials may be renewed easily and The generator requires for its construction a small widemouthed bottle (we used a four-ounce bottle), a six-inch calcium chloride tube which held sixty milliliters of liquid, some glass and rubber tubing, one two-hole stopper, and a small amount of paraffin. The bottle is divided into compartments by pouring hot paraffin on top of about a half inch of water. To keep the paraffin in place in case it does not adhere to the side of the bottle two small glass tubes (X,Y ) are placed in the bottle so that the ends project above the paraffin. When the paraffin has cooled the water is shaken out and a hole is melted in the paraffin between the two small glass tubes by using a piece of hot glass tubing. The short lengths of glass tubing may be moved as soon as the paraffin is poured to allow proper spacing. The calcium chloride tube may be lengthened bv fusing a piece of glass tubing to it but it is probably more practical for beginning students to use rubber tubing (0. The rest of the generator may be constructed by referring to the diagram. We use a bottle of the same size as a wash bottle for the gas and control the flow of the gas by using a screw clamp. To fill the generator with the solid, the stopper is removed and the generator turned on its side and the solid reagent placed on t h e portion Individual Kipp Generator marked B. The stopper is replaced and the liquid is poured into the calcium chloride tube.
