A method of measuring gastric pressure during vagotomy.

in 4 g. quantities in sealed packages to be opened at the bedside or in airtight screw cap containers, from which they may be dispensed by the teaspoonful (3-4 g.). Four grammes of these granules containing 26 mEq. of potassium dissolve rapidly in a glass of water making a pleasant effervescent drink which may be flavoured with fruit juice if so desired. Solution is complete within 30 seconds and the potassium residues remaining in the glass amount to less than 0-1 mEq. A dose of 8 to 12 g. of these granules daily causes a minimum of gastric disturbance yet provides an intake of potassium large enough to combat potassium depletion in all except the most extreme clinical contingencies. Reliability of solution and absorption commends the use of this preparation in preference to enteric-coated potassium tablets.