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242 HISTORY OF DENTAL SUEGEEY
"We have received from Messrs. Ash tlie accompanying illustration of the
new form of dental operating chair, introduced by Mr. Geo. Owen, and de-
scribed on p. 386, Volume II of this journal.
"In this engraving tlie seat is represented a little
above its lowest position, and the head-piece thrown
forward to its fullest extent.
"Messrs. Ash have undertaken to supply tlie pro-
fession with this chair, and enumerate its capabilities
as follows
"1st. There is no machinery whatever below the
seat, which has, therefore, a range of from sixteen to
eighteen inches, and when at its lowest point it stands
aljout fcfurteen inches from tlie floor, corresponding
to the heiglit of an ordinary drawing room easy chair.
"2nd. The seat can be raised or lowered with great facility while the pa-
tient is seated, and may be adjusted to three-sixteenths of an inch.
"3rd. This great range of motion in the seat being gained, for the most
part, in a downward direction, admits of the back of the chair being fixed ; its
inclination is about thirty-six degrees from the perpendicular, repeated and
careful observation liaving shown that to lie, in all cases, the most convenient
and the most comfortable for the patient to recline in.
"ith. Tlie head-piece is fixed as to heiglit, the level of it lieing determined
to suit the stature of the purchaser. It can be instantly and easily placed at
any angle, one hand only being needed to alter its position, which may be done
without interrupting the operation, and it fixes itself securely, however placed.
In the chair represented by the engraving there are two depressions for the
head to rest in, according to the side of the patient on which the operator may
require to place himself. This form of head-piece lias been found to be ex-
tremely convenient, and it is tlierefore recommended for general adoption, but
each dentist can suit his own wishes on this point.
'5th. Tliere is no noise whatever connected necessarily with the working.
"6tli. The frame carrying tlie stuffing that forms the back of the chair and
the head-piece is detached by a screw for purposes of cleanliness, and occa-
sionally oiling the spindle, etc.
"7th. The chair is massive, firm aud elegant, witliout being cumbrous, and
there is nothing to impede the view of the floor under it, wliatever may be tlie
point froTii wliicb it is seen.
242 HISTORY OF DENTAL SUEGEEY
"We have received from Messrs. Ash tlie accompanying illustration of the
new form of dental operating chair, introduced by Mr. Geo. Owen, and de-
scribed on p. 386, Volume II of this journal.
"In this engraving tlie seat is represented a little
above its lowest position, and the head-piece thrown
forward to its fullest extent.
"Messrs. Ash have undertaken to supply tlie pro-
fession with this chair, and enumerate its capabilities
as follows
"1st. There is no machinery whatever below the
seat, which has, therefore, a range of from sixteen to
eighteen inches, and when at its lowest point it stands
aljout fcfurteen inches from tlie floor, corresponding
to the heiglit of an ordinary drawing room easy chair.
"2nd. The seat can be raised or lowered with great facility while the pa-
tient is seated, and may be adjusted to three-sixteenths of an inch.
"3rd. This great range of motion in the seat being gained, for the most
part, in a downward direction, admits of the back of the chair being fixed ; its
inclination is about thirty-six degrees from the perpendicular, repeated and
careful observation liaving shown that to lie, in all cases, the most convenient
and the most comfortable for the patient to recline in.
"ith. Tlie head-piece is fixed as to heiglit, the level of it lieing determined
to suit the stature of the purchaser. It can be instantly and easily placed at
any angle, one hand only being needed to alter its position, which may be done
without interrupting the operation, and it fixes itself securely, however placed.
In the chair represented by the engraving there are two depressions for the
head to rest in, according to the side of the patient on which the operator may
require to place himself. This form of head-piece lias been found to be ex-
tremely convenient, and it is tlierefore recommended for general adoption, but
each dentist can suit his own wishes on this point.
'5th. Tliere is no noise whatever connected necessarily with the working.
"6tli. The frame carrying tlie stuffing that forms the back of the chair and
the head-piece is detached by a screw for purposes of cleanliness, and occa-
sionally oiling the spindle, etc.
"7th. The chair is massive, firm aud elegant, witliout being cumbrous, and
there is nothing to impede the view of the floor under it, wliatever may be tlie
point froTii wliicb it is seen.
