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The peculiarity of the northeastern quadrant which immediately strikes the eye is the prevalence of the broad plains called Maria, or "seas." The northern and central parts are occupied by the Mare Imbrium, the "Sea of Showers" or of "Rains," with its dark bay the Sinus Æstuum, while the eastern half is covered by the vast Oceanus Procellarum, the "Ocean of Storms" or of "Tempests."
It has now been known for some time that the primary stimulus of cardiac contraction generally occurs at the upper part of the right auricle, near its junction with the superior vena cava, and that this region may be the "timer" of the heart. This is called the sinus node, or the sino-auricular node, and consists of a small bundle of fibers resembling muscle tissue.
If the tuberculous abscess has burst and left a sinus, this is apt to persist because of the presence of tuberculous tissue in its wall, and of superadded pyogenic infection, or because it serves as an avenue for the escape of discharge from a focus of tubercle in a bone or a lymph gland. [Illustration: FIG.
The spongy nature of this meshwork affords free access of aqueous to the venous sinus of Schlemm, thence by tributaries into the supra-choroidal space and anterior uveal venous system. Fuchs's iris cripts afford direct access of aqueous to the veins of the iris. Furthermore, two simple principles are taught by physics: Fluids are incompressible and they seek the lowest hydrostatic level.
The infant European has sundry marked points of resemblance to the lower human races; as in the flatness of the alæ of the nose, the depression of its bridge, the divergence and forward opening of the nostrils, the form of the lips, the absence of a frontal sinus, the width between the eyes, the smallness of the legs.
Hundreds of "Nature Cure" babies all over this country are living proofs of this gladsome message to all those who have assumed or intend to assume the responsibilities of parenthood. Natural Immunity Under Division II of "Secondary Causes or Manifestations of Disease" we find mentioned germs, bacteria, parasites, inflammations, fevers, skin eruptions, chronic sinus discharges, ulcers, etc.
It is generally sessile and solitary, and may grow into the interior of the skull, into the frontal sinus, into the cavity of the orbit or nose, or may fill up the external auditory meatus, causing most unsightly deformity and interference with sight, breathing, and hearing.
However, I will not be positive that my imagination did not assist in this accumulation. But what shall I do? Cut down into this sinus, and hunt the bleeding artery, and tie it? Could I find it? And could I tie it if I did find it? Probably not; and more especially if it is a lumbar artery, and injured in the foramen through which it passes from the vertebra.
In the latter disease, it is sometimes necessary to trephine and wash out the sinus or sinuses affected with an antiseptic solution. It may be necessary to continue this treatment for several weeks. BRONCHITIS. Inflammation of the bronchial tubes may be either acute or chronic.
And also the cities of Pyrrha and Antissa, about Palus Meotis; and also the city Burys, in the Corinthian Gulf, commonly called Sinus Corinthiacus, have been swallowed up with the sea, and are not at this day to be discerned: by which accident America grew to be unknown, of long time, unto us of the later ages, and was lately discovered again by Americus Vespucius, in the year of our Lord 1497, which some say to have been first discovered by Christopher Columbus, a Genoese, Anno 1492.
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