. The Journal of laboratory and clinical medicine . Fie 4.—Back of dial. (1) Double horizontal lever. (2) Trigger rods. (3) Springs controlled bydouble horizontal lever so adjusted as to record on the dial each 5 liters of air Fig. 5.—Showing details of: .4, e.\i)ired air reser\oir and mixer; B, Siphon reservoir and con-nections. (1) Expiration tube from the spirometers. (2) Air baffle. (3) Xents for escape of ) Sampling tube. (5) Tube for pumping exjiired air to siphon reservoir. (o) Pump connection.(7) Check valve on air line. (8) Filling cup and pressure equalizing vent.

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. The Journal of laboratory and clinical medicine . Fie 4.—Back of dial. (1) Double horizontal lever. (2) Trigger rods. (3) Springs controlled bydouble horizontal lever so adjusted as to record on the dial each 5 liters of air Fig. 5.—Showing details of: .4, e.\i)ired air reser\oir and mixer; B, Siphon reservoir and con-nections. (1) Expiration tube from the spirometers. (2) Air baffle. (3) Xents for escape of ) Sampling tube. (5) Tube for pumping exjiired air to siphon reservoir. (o) Pump connection.(7) Check valve on air line. (8) Filling cup and pressure equalizing vent. (9) Siphon. (lOJCollar in which siphon slides. (11) Water gauge. spiro:\ 425 clamped near the end and attached to the sampling- tube of the short inside tube or vent tube is now opened, the siphon puslied doAvn-?\vard to the bottom of the reservoir, and the subjects expired air pumped intothe reservoir, thus compressinoc tlie air and forcing the water into the re-

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Keywords: ., bookcentury1900, bookdecade1910, booksubject, booksubjectmedicine