Diabetes mellitus: its history, chemistry, anatomy, pathology, physiology, and treatmentIllustrated with woodcuts, and cases successfully treated . ode of ascertaining the specific gravityof saccharine urine is by means of DENSITY BEADS orbulbs; they are made of glass, and present the formshown in the accompanying sketch, letter C, and suchas were formerly used in ascertaining the specificgravity of spirit. These beads are numbered 5, 10, 15, 25, &c., and aregradually dropped into the urineuntil one sinks to the bottom of thevessel, when by reading off the numberon the last bead that floated,
Diabetes mellitus: its history, chemistry, anatomy, pathology, physiology, and treatmentIllustrated with woodcuts, and cases successfully treated . ode of ascertaining the specific gravityof saccharine urine is by means of DENSITY BEADS orbulbs; they are made of glass, and present the formshown in the accompanying sketch, letter C, and suchas were formerly used in ascertaining the specificgravity of spirit. These beads are numbered 5, 10, 15, 25, &c., and aregradually dropped into the urineuntil one sinks to the bottom of thevessel, when by reading off the numberon the last bead that floated, thespecific gravity of the liquid is ascer-tained. In the urine glass it will bpobserved, that bead 20 being too heavy,has sunk to the bottom, while bead15 is floating at the top. The specificgravity of the liquid is There are various objections,however, to this mode of testing, andit is but seldom used. A third mode is by the use of alittle instrument called the Pickno-meter, which is shown in the wood-cut E, page 27. It is a small bottle,with a long stopper perforated by acapillary tube. When the stopper is urine PHYSICAL PEOPEETIES OF DIABETIC URINE. 27 accurately adjusted, the bottle holds exactly 20 ouncesof distilled water. To ascertain the specific gravityof the urine by its means, the bottle is filled to over-flowing, accurately stoppered, wiped dry, and weighed;and the difference between its weight, when filled withdistilled water, and with urine, indicates the specificgravity. This process, however, is not often adoptedfor ordinary purposes. A fourth mode of ascertaining the presence andquantity of sugar in the urine, is that known as theFermentation test. This test was first suggested byProfessor Christison: and usually knownas Christisons test. The apparatus,suggested by Harley and Pavy, is simpleenough as delineated in the followingwoodcut, F, p. 28. It consists of anordinary test-tube, to which a tightly-fitting cork is adapted, through whi
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyo, bookyear1877
