Catalogue of dental materials, furniture, instruments, etc., for sale . me cases where if per-manent it would be very inconvenient to the Operator. The Low Arm () finisheslevel with the Seat cushion, except at the front, where its full height is a useful rest forthe patients arm. The reclining motions of the Chair are in no way affected by thisLow Arm. The Foot-Board at its outer extremity terminates in a supplemental step Best,4 inches wide, which is raised 3i inches, leaving an easy passage under it for the feetwhen resting on the platform. For the information of those who have not seen
Catalogue of dental materials, furniture, instruments, etc., for sale . me cases where if per-manent it would be very inconvenient to the Operator. The Low Arm () finisheslevel with the Seat cushion, except at the front, where its full height is a useful rest forthe patients arm. The reclining motions of the Chair are in no way affected by thisLow Arm. The Foot-Board at its outer extremity terminates in a supplemental step Best,4 inches wide, which is raised 3i inches, leaving an easy passage under it for the feetwhen resting on the platform. For the information of those who have not seen the Harris Chair, we add the fol-lowing Explanation of the remaining letters on the Cat. E. S. is the Elevating Screw;and E. H. the Elevating Handle, by turning which, the Chair, with the patient in it,may be readily raised or lowered 13 inches. B. H. Brake Handle, by which the Chairmay be clamped so that it will not rotate when leaned against by the Operator. Foot-Board Handle, whereby the Foot-Board is adjusted in height. This Handle DENTAL CATALOGUE. 241. can also be used by the patient while seated, to change the height of the Foot-Rest forconvenience. is the Reclining Handle. By moving this less than half a turn,the whole reclining motion of this machine is freed. It may then be moved with avery slight effort of one hand from the upright to a nearly horizontal position. Whenthe desired incline is gained, a slight turn of locks it again immovably. In thisreclining motion the patient does not assist, and is not disturbed. The Head-Rest shown in the Cut has the following adjustments:—Up and down,fully 12 inches ; backward and forward, 6 inches; the whole cushion to either side, 6inches. Besides which the cushion has f of a circle motion of inclination on its ownback-rod, clamped by Screw E, and the whole Head-Rest may swing around entirely onits Stem A, being secured in its turning as well as its height by the handle C. Com-binations of these motions are
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