CIVIL WAR HYDROMETER (AN INSTRUMENT FOR DETERMINING THE SPECIFIC GRAVITY OF A LIQUID SOLUTION, AND ITS STRENGTH). A FINE MEDICAL INSTRUMENT OF THE CIVIL WAR ERA. HOUSED IN IT'S ORIGINAL HAND CRAFTED WOODEN CASE, IT IS IN EXCELLENT CONDITION. THE LID OF THE CASE IS MARKED WITH THE BRITISH CROWN, THE NUMBER "4994", AND THE INITIALS "E.R.". FOR REFERENCE SEE: DAMMANN'S CIVIL WAR MEDICAL INSTRUMENTS, VOL. I, PAGE 34, ILLUSTRATION 58.
