. Annual report of the Board of Regents of the Smithsonian Institution . Nitrating PEOGKESS IN EXPLOSIVES GUTTMANN. 281 either with a pipe supplying fresh acid or with a discharge earthenware grating closes the opening of the stem, the new acidis introduced, the cotton dipped in it in the usual way, and thensegments made of perforated earthenware plates are laid on top so asto immerse the cotton completely. A small vessel with four outletsis now laid on top, and a Segner wheel distributes water evenly intoit, and this is so regulated as to flow out quite slowly and lay i
. Annual report of the Board of Regents of the Smithsonian Institution . Nitrating PEOGKESS IN EXPLOSIVES GUTTMANN. 281 either with a pipe supplying fresh acid or with a discharge earthenware grating closes the opening of the stem, the new acidis introduced, the cotton dipped in it in the usual way, and thensegments made of perforated earthenware plates are laid on top so asto immerse the cotton completely. A small vessel with four outletsis now laid on top, and a Segner wheel distributes water evenly intoit, and this is so regulated as to flow out quite slowly and lay itself onthe top of the acid without disturbing the latter. Tliis layer ofwater retains all fumes that may arise from the acid, so that the airin the room is quite good. When nitration is finished water is againallowed to run in, but at the same time connection is made with theoutlet pipe, and, the flow of the water being carefully regulated,, itgradually displaces the acid. Finally the nitrocotton can be given apreliminary washing. This process gives very good results, and is very convenient
Size: 1385px × 1803px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
