. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. sufficient to bring the water down to the edge of the index. 5th. Pour a little coloured spirit into the bent tube 5, until it stands about 3£ inches, as at 6. 6th. Turn off the air-tap 1, then suspend the counterbalance weights, 11,11, from the cord over the pullies. The spirometer is now ready for an observa- tion. The flexible tube, terminated with a glass mouth-piece, is held by the person about to be examined, and the tap 1 is to be kept open by the operator while the deep expira- tion is being made. To discharge th
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. sufficient to bring the water down to the edge of the index. 5th. Pour a little coloured spirit into the bent tube 5, until it stands about 3£ inches, as at 6. 6th. Turn off the air-tap 1, then suspend the counterbalance weights, 11,11, from the cord over the pullies. The spirometer is now ready for an observa- tion. The flexible tube, terminated with a glass mouth-piece, is held by the person about to be examined, and the tap 1 is to be kept open by the operator while the deep expira- tion is being made. To discharge the air out of the receiver. — It will be seen that if the tap 1 be opened, the receiver will rise out of the reservoir by the power of the counterbalance weights, until it touches the cross-head 9. To return the receiver into its original position, the con- tained air must be discharged; this can be done by slowly depressing the receiver down into the reservoir, and so pressing the air out by the way it entered, — through the air-tube. But, in order to do so more rapidly, a large valve at 14 admits of an instantaneous escape of the air. Therefore, to discharge the air, remove the plug 15 out of the socket 14 with one hand, while the other returns the receiver into its original position. Let the person to be examined loose his vest, and any other tight garment — for the least pressure from dress affects the mobility — stand perfectly erect (fg. 705.), with the head Fig. 705. Spirometer. 3rd. Pour into the spout, behind, clear cold water, until it is seen to rise behind the slip of glass 3 (above the air-tube). 4th. Slide the moveable index 2, opposite 0 on the graduated scale 13, and add more water until it is ex actly on a level with the straight edge of this index ; if too much water be poured jn, draw off, by the tap 4,. thrown well back ; then slowly and effectually fill his chest with air, or inspire as deeply as possible, and then he must lift the mouth- piece of
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