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In my paper in The Journal, June 20, 1908, were illustrated and described an anesthesia apparatus and a blood aspirator, which were designed for use in surgical operations in the mouth and throat. Having since then improved these devices I will describe briefly the changes made therein, which are shown in the illustrations here given. In place of the foot bellows formerly employed in the anesthesia apparatus (Fig. 1), I have substituted the less expensive and simpler Politzer air-bag of the six-ounce size, provided with an inlet valve in the bag, and have supplied, in addition, a similar valve in the tube leading therefrom to the ether bottle, in order to prevent any rearward motion of the air while the hand bag is being expanded. In this way the air current supplied is intermitting, and its motion is timed with the patient's inspirations.
The bottles are
PYNCHON E. IMPROVED ETHER INHALER AND BLOOD ASPIRATOR. JAMA. 1910;LIV(21):1690. doi:10.1001/jama.1910.92550470001001l
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