OSMOTIC PRESSURE 



'S3 



\ 



\ 



15 



FIG. 48. ONE OF THE FORMS OF OSMOMETER USED BY MORSE. 



13. Solid glass stopper for use with substances which attack metals. 



a, Manometer tube. 



b, Vent for solution, closed by valve at lower end of stopper 



14. Glass manometer attachment for cells with straight necks. 



a, Manometer with straight tube fused to lower end. 



b, Space between manometer and glass tube. 



c, Brass ring. 



d, and e, Porcelain rings for compressing packing. 

 f, Brass collar. 



y, h, i, and j, Brass pieces with which to close the cell, and also to adjust initial pressure. 

 k, Vent for solution. 



15. Glass manometer attachment for cells with straight necks. Like that of Fig. 



14, except that the glass tube is left open at the top and then closed with a 

 brass cap and litharge-glycerine cement. 



(Morse, 1914, p. 25 ; Carnegie Institution of Washington.) 



