ANATOMY AND PHYSIOLOGY
Wasson1 presents a roentgen study of the changes in the nasal sinuses after birth to determine at what time the sinuses become fully aerated and what influence this might have on subsequent events with reference to the respiratory tract. He concludes that, in general, the antrums and the ethmoid sinuses of an infant do not become fully aerated until from four to eight weeks after birth and that the state of aeration is an important influence on the condition of these sinuses during the first two years of life.Eckert-Möbius2 presents a comparative study of the nasal accessory sinuses in man and in mammals. With regard to the function of the accessory sinuses, the author rejects the idea that they play any part in the improvement of the sense of smell or that they have arisen to reduce the weight of the skull. He feels,