United States or Niger ? Vote for the TOP Country of the Week !
Heat and velocity of the supposed sound waves. 5. Decrease in loudness of sound. 6. The physical strength of the locust. 7. The barometric theory of Sir Wm. Thomson. 8. Elasticity and density of the air. 9. Interference and beats. 10. The membrana tympani and the corti arches. Under the first head Dr.
Besides, there are the products of the interstitial cells, the creations of a special layer of cells around the ovum, the membrana granulosa. They produce a substance tonic to the uterus. When the ovaries are removed, there occurs an atrophy of the womb muscle, due to loss of this tonic substance.
The embryo develops and breathes by material transmitted from the mother through the umbilical cord. We encounter here also a very detailed description of a specimen of exfoliated membrana mucosa uteri which our author mistakes for an embryo, but his remarks at least exhibit the most eager curiosity.
The area of the membrana tympani is about twenty times as great as the membrane of the internal ear which is acted upon by the stapes. The force from the larger surface is, therefore, concentrated by the bridge of bones upon the smaller surface.
In this disease the skin is dry from the increased absorption of the cutaneous lymphatics, the fat is absorbed from the increased absorption of the cellular lymphatics, the mucus of the lungs is too viscid to be easily spit up by the increased absorption of the thinner parts of it, the membrana sneideriana becomes dry, covered with hardened mucus, and at length becomes inflamed and full of aphthæ, and either these sloughs, or pulmonary ulcers, terminate the scene.
Centre of body high; head Strong movements and cries as soon disproportionate in size; membrana as born; body clear, red colour, pupillaris present; testicles coated with sebaceous matter; mouth, undescended; deep red colour of nostrils, eyelids, and ears, open; parts of generation; intense red skull somewhat firm, and fontanelles colour, mottled appearance, and not far apart; hair, eyebrows, and downy covering, of skin; nails not nails, perfectly developed; formed; feeble movements; testicles descended; free discharge inability to suck; necessity for of urine and meconium; power of artificial heat; almost unbroken suction, indicated by seizure on the sleep; rare and imperfect nipple or a finger placed in the discharges of urine and meconium; mouth. closed state of mouth, eyelids, and nostrils.
The outer layer is continuous with the lining of the auditory canal; the inner is a part of the lining of the middle ear; and the middle is a fine layer of connective tissue. Being thin and delicately poised, the membrana tympani is easily made to vibrate by the sound waves that enter the auditory canal. In this way it serves as a receiver of sound waves from the air. It also protects
Mott proved that the membrana tympani was not necessary for good hearing, that in fact when it was punctured, a deaf man could in many cases be made to hear, and in fact it improved the hearing in general; the only reason why the tympanic membrane was not punctured oftener was that dust, heat, and cold were apt to injure the middle ear. In closing his paper Dr.
But Professor HARRISON, in a paper read before the Royal Irish Academy in 1847, has stated that on a careful examination of the head of an elephant which he had dissected, he could "see no evidence of the muscular structure of the membrana tympani so accurately described by Sir E. HOME." Sir EVERARD'S deduction, I may observe, is clearly inconsistent with the fact that the power of two elephants may be combined by singing to them a measured chant, somewhat resembling a sailor's capstan song; and in labour of a particular kind, such as hauling a stone with ropes, they will thus move conjointly a weight to which their divided strength would be unequal.
A phenomenon must be accounted for, and he who will not accept a theory offered, or even a word applied, is indebted in a full explanation. The rumour spread in long slow ripples, till at last one of them struck the membrana tympani of the laird, where he sat at luncheon in the House of Glashruach.
Word Of The Day