title: Proceedings: An improved apparatus for automatic sampling and the control of isolated preparations.
mesh_terms: D000818:Animals; D001322:Autoanalysis / Q000295:instrumentation*; D001681:Biological Assay; D006168:Guinea Pigs; D006632:Histamine / Q000032:analysis; D007082:Ileum / Q000032:analysis; D066298:In Vitro Techniques
chemical_list: D006632:Histamine