s
got the first is not truly wise unless his mind has reduced and
assimilated it, as Dr. Prout would have said, unless he appropriates and
can use it for his need.

The prime qualifications of a physician may be summed up in the words
_Capax_, _Perspicax_, _Sagax_, _Efficax_. _Capax_--there must be room to
receive, and arrange, and keep knowledge; _Perspicax_--senses and
perceptions, keen, accurate, and immediate, to bring in materials from
all sensible things; _Sagax_--a central power of knowing what is what,
and what it is worth, of choosing and rejecting, of judging; and
finally, _Efficax_--the will and the way--the power to turn all the
other three--capacity, perspicacity, sagacity, to account, in the
performance of the thing in hand, and thus rendering back to the outer
world, in a new and useful form, what you had received from it. These
are the intellectual qualities which make up the physician, without any
one of which he would be _mancus_, and would not deserve the name of a
complete artsman, any more than proteine would be itself if any one of
its four elements were amissing.

We have left ourselves no room to speak of the books we have named at
the end of this paper. We recommend them all to our young readers.
Arnauld's excellent and entertaining _Art of Thinking_--the once famous
Port-Royal Logic--is, if only one be taken, probably the best. Thomson's
little book is admirable, and is specially suited for a medical student,
as its illustrations are drawn with great intelligence and exactness
from chemistry and physiology. We know nothing more perfect than the
analysis, at page 348, of Sir H. Davy's beautiful experiments to account
for the traces of an alkali, found when decomposing water by galvanism.
It is quite exquisite, the hunt after and the unearthing of "_the
residual cause_." This book has the great advantage of a clear, lively,
and strong style. We can only give some short extracts.

INDUCTION AND DEDUCTION.

"We may define the inductive method as the process of
discovering laws and rules from facts, and causes from effects;
and the deductive, as the method of deriving facts from laws,
and effects from their causes."

There is a valuable paragraph on anticipation and its uses--there is a
power and desire of the mind to project itself from the known into the
unknown, in the expectation of finding what it is in search of.

"This power of divination, this sagacity, which