pursuits. The excessive use of either tea or coffee will cause
wakefulness."

Dr. Kane, the Artic Explorer, speaking of the diet of his men
while sojourning in the Artic ice fields, said that his men
preferred coffee in the mornings, but at night, "tea soothed
them after a hard day's labor, and better enabled them to sleep."

Dr. Edward Smith, an English Physiologist, in an address before
the Royal Medical and Chirurgical Society, remarked that "tea
increased waste in the body, excited every function, and was well
fitted to cases where there was a superfluity of material in the
system;--but is injurious to the under-fed, or where there is
greater waste than supply." Dr. Smith recommended tea as a
preventive of heat-appoplexy, and in cases of suspended
animation, as from partial drowning.

We have selected these expressions of opinion from among a large
number of diverse character, for the purpose of illustrating the
uncertainty of knowledge concerning tea. To recapitulate:--

Professor Johnston finds that tea exhilarates; excites to
activity, produces wakefulness; yet it sooths, and it
tranquilizes the vascular system; it lessens waste and saves
food.

Dr. Smith found tea to increase waste, and to be injurious where
food is deficient; says tea excites every function,--which must
include the vascular system.