Anæsthesia and anæsthetics general and local . through which air currentpasses; B is a rubber bag. The patient breathes back and forth into thebag. There are no valves and no arrangement for admitting fresh face-piece fits tightly to the tube T which connects with a shaft pass-ing through the reservoir. The mounting of bag B fits into the other endof this shaft. The current of air is regulated in passing over the ether byrevolving the reservoir on the tube T. The reservoir is charged at thefunnel-shaped tube FT. ETHER 109 administration is preferable. The moderately experienced admin-i
Anæsthesia and anæsthetics general and local . through which air currentpasses; B is a rubber bag. The patient breathes back and forth into thebag. There are no valves and no arrangement for admitting fresh face-piece fits tightly to the tube T which connects with a shaft pass-ing through the reservoir. The mounting of bag B fits into the other endof this shaft. The current of air is regulated in passing over the ether byrevolving the reservoir on the tube T. The reservoir is charged at thefunnel-shaped tube FT. ETHER 109 administration is preferable. The moderately experienced admin-istrator will certainly encounter less difficulty in anaesthetizing bythis method, and it is therefore the most popular and widely em-ployed system. By the close method of administration the amount of airadmitted is restricted and under control, and the expired air isrebreathed to a greater or less extent. The names of Smith,of New York; Porta, of Pavia; and Morgan, of Dublin, areconnected with the introduction of inhalers adapted to this =^n. TMg. 27.—Sectional view of Clovers Inhaler. Indicator at Hewitt. Figs. 27, 28. Shows the reservoir F and tube T in section. E is asphere tunnelled by shaft S into which T fits. E holds the ether which isentered at tube FT closed by stopper St. One-half of the sphere is coveredby a cap C. The space between C and E is filled nearly with water whichprevents the inhaler from becoming too cold. In the shaft there are fourlarge openings, two (O) on upper wall, and two (O) on lower. Theseallow communication between interior of shaft and ether reservoir. Theshaft contains diaphragm D closing one-half of the shaft. Thetube T passes into the shaft S and has a beveled end which fits closeagainst the diaphragm of the shaft. It has an indicator (0 pointing to fig-ures on the reservoir. With the indicator at O the air current on in-spiration will take the course shown in Fig. 27. With the indicator atF the air current on inspirati
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