PHYSIOLOGICAL CHEMISTRY 



showing the relationship of conductance to acidities are given in 

 Fig. 48, page 152. 



The idea of making a fractional examination of gastric contents is 

 not new. Most of such attempts have been made, however, by using 

 the old type of stomach tube and removing the entire stomach contents 

 at different intervals on successive days, e.g., after fifteen minutes the 

 first day, thirty minutes the second day, forty-five minutes the third 

 day, etc. Hayem 1 was the first to employ this method and later 



FIG. 47. FIG. 48,. 



FIG. 47. BERGEIM INTRAGASTRIC CONDUCTANCE APPARATUS. 



Diagrammatic cross-section showing platinum electrodes A, A, with leads A'; thermo- 

 couple T with leads, T'\ tube for aspiration B\ and outer protecting tube C. (Bergeim: 

 American Journal of Physiology, 45, i, 1917.) 



FIG. 48. CURVES SHOWING RELATIONSHIP OF CONDUCTANCE TO ACIDITIES. 

 \Bergeim: American Journal of Physiology, 45, i, 1917. 



Ewald and Boas, 2 Reichmann, 3 v. Jaksch, 4 Kornemann, 5 Schule 6 and 

 Gregersen 7 followed a similar procedure. The first report of data from 

 the entire gastric cycle obtained by means of a small bore tube were 

 made by Ehrenreich. 8 This investigator used a Nelaton catheter. 

 Skaller 9 has reported a few experiments in which a small bore stomach 

 tube with a metal tip was employed and the stomach contents 

 subjected to fractional analysis. 



1 Hayem: Brouardel & Gilbert's, Traite de Medecine, 4, 236, 1905. 



a Ewald & Boas: Virchow's Arch., 101, 325, 1885. 



3 Reichmann: Zeit.f. klin. Med., 24, 565, 1885. 



4 v. Jaksch: Zeit.f. klin. Med., 19, 383, 1890. 



'Kornemann: Arch. f. Verdauungskr., p. 369, 1912. 



Schule: Zeit.f. klin. Med., 27, 461, 1895. 



7 Gregersen: Arch. f. Verdauungskr., 19, 263, 1913. 



8 Ehrenreich: Zeit.f. klin. Med., p. 231, 1912. 



'Skaller: Berl. klin. Woch., 50, No. 47, 1913. 



