Observations on the Blood Sugar in Diabetes Mellitus
Boston Medical and Surgical Journal
until it reaches the height of the column of water in CD. The reading is now taken in centimeters of the height to which the column of water stands in CD, and this is so graduated as to represent the percentage of CO" which was absorbed by alkali and replaced by water. This completes the test. The apparatus is prepared for the next test by opening cock C so that A to B is a continuous passage. The fluid in the apparatus is allowed to escape. Orifice B is put under the faucet and cold water
... and cold water allowed to run through the apparatus, taking care to shake sufficiently at the time so that water touches all of the inside of the apparatus. Repeat. Then pour through orifice B about 10 cc. of 4% solution boric acid. Rinse the apparatus very thoroughly with the acid so that there shall be no alkali remaining adherent to its sides. "Wash again with cold water. Leave the apparatus so that orifices A and B are down, thereby allowing any water in the apparatus to drain out. From the above it will be seen that the apparatus necessary is, first, the Fridericia appliance, a glass tank, whose depth is equal to the length of the Fridericia apparatus, a wash bottle containing 20% solution of potassium hydrate and another wash bottle containing 4% solution of boric acid. It is convenient to add an indicator, such as alizarin, or litmus, to the alkaline and acid fluids. Observations on the Blood Sugar in Diabetes Mellitus.