RT Journal
A1 PRATT JH, MORRISON H
T1 THe activity of american digitalis
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1919
FD November 22
VO 73
IS 21
SP 1606
OP 1611
DO 10.1001/jama.1919.02610470042012
UL http://dx.doi.org/10.1001/jama.1919.02610470042012
AB Before the world war the greater part of the digitalis used in this country came from Germany and Austria. Some digitalis was imported from England; but, in the vicinity of Boston at least, the preference for the high grade German leaf in the three or four years before the war was so pronounced that the use of selected English leaf, previously held in high favor, greatly diminished. Biologic tests made in this laboratory in 19091 showed that the best German digitalis on sale in Boston was of greater activity than the best English digitalis obtainable here.Our attention was directed to the possibility of using American digitalis as early as 1910, when a tincture of digitalis made from leaf grown in the Rocky Mountains was found by Wesselhoeft, working in this laboratory, to be nearly twice as strong as the tincture in use at that time in the Massachusetts General