made use of the fact that NC was piped to the mixing point as a slurry in water. When this arrived in the mixing vessel (Tun dish), the nitroglycerine was added by a gravity spray system.
This picture (below) shows the operation in what was called a burette house:
After the spraying process, the mixture was sent to the paste mixing house, where thorough mixing occurred, resulting in a flat sheet with most surplus moisture removed. See the picture of a typical mixing house below:
