h questions as those connected with the contagion or non-contagion
of cholera and yellow-fever, he is considered _below par_. He saw the
yellow-fever in 1802-3, at Martinique, while _aid-de-camp_ to the
Governor, and still adheres to the errors respecting it which he imbibed
in his youth, and when he was misled by occurrences taking place _within
a malaria boundary_, where hundreds of instances are always at hand,
furnishing the sort of _post hoc propter hoc_ evidence of contagion with
which some people are satisfied, but which is not one bit less absurd,
than if a good lady, living in the marshes of Kent, were to insist upon
it, that her daughter Eliza took the ague from her daughter Jane,
because they lived together. Strange to say, however, M. Casimir Perier,
the Prime Minister of France, seems to be guided, according to French
journals, by the opinions of this gentleman on cholera, instead of by
different medical commissions sent to Warsaw, &c.

The question of contagion in cholera has been now put to the test in
every possible way, let us view it for a moment, as compared with what
has occurred in regard to typhus at the London Fever Hospital, according
to that excellent observer Dr. Tweedie, physician to the establishment.
Doubts, as we all know, have been of late years raised as to the
contagion of typhus, but I believe nothing that has as yet appeared is
so well calculated to remove those doubts as the statements by this
gentleman (_see "Illustrations of Fever"_), where he shows that it has
been remarked for a series of years that "the resident medical officers,
matrons, porters, laundresses, and domestic servants not connected with
the wards, and every female who has ever performed the duties of a
nurse, have one and all been the subjects of fever,"--while, _in the
Small-Pox Hospital_, which adjoins it, according to the statements of
the physician, "no case of genuine fever has occurred among the medical
officers or domestics of that institution for the last eight years." Had
typhus been produced in the attendants by _malaria_ of the locality,
those persons in the service of the neighbouring Small-Pox Hospital
should also have been attacked to a greater or less extent, it is
reasonable to suppose, within the period mentioned. Now let this be
compared with all that has been stated respecting attendants on cholera
patients, and let it be compared with the following excellent fact in
illustration, showing how numbe