Table 1: Cone opening angle(s) $\Omega$ , diameter of the outflow base B = 2 b, and cone wall thickness $\Delta$ b determined in earlier optical observations and recent radio observations.
Observation Cone angle $\Omega$ Diameter Cone Wall

[ $\hbox {$^\circ $ }$ ] at Base B [pc] Thickness $\Delta$ b [pc]

Optical Observation

(1) Lynds & Sandage (1963) "closed loops'' ( $\Omega$ = 120)

(2) Burbidge et al. (1964) $\Omega$ $\approx$ 20 pointed

(3) Deharveng & Pellet (1970) "loop'' 30; 300

(4) Heckathorn (1972) cone pointed

(5) Axon & Taylor (1978) cone

(6) Bland & Tully (1988) "bubbles'' pointed

(7) Heckman et al. (1990) $\Omega$ $_{\rm SE}$ = $\Omega$ $_{\rm NW}$ = 62 pointed

(8) Götz et al. (1990) $\Omega$ = 30 B $_{\rm o}$ = 750

(9) McKeith et al. (1995) $\Omega$ = 30 $\sim$ 500

(10) Shopbell et al. (1998) SE: $\Omega$ $_{\rm i}$ = 5; $\Omega$ $_{\rm o}$ = 25 375-400

Derived by us from:

(11) Width Ellips (BT-88) 250

(12) Width Ellips (HAM-90) 200-400

(13) Thickness Filaments (DB-99) 150-200

Radio Observation (CO)

(14) Seaquist & Clark (2001) $\Omega$ $_{\rm SE}$ = 90, $\Omega$ $_{\rm NW}$ = 40 $\sim$ 750 $\sim$ 300

(15) Walter et al. (2002) $\Omega$ $_{\rm SE}$ = 55 $\sim$ 400 $\sim$ 250

Derived by us from :

(16) Neininger et al. (1998) B $_{\rm i}$ $\approx$ 300; B $_{\rm o}$ $\approx$ 800 $\sim$ 250

SE: South-Eastern side of disk; NW: North-Western side of disk.

Remarks made by the authors or by us: (1) LS.: opening angle used in a model discussion. (2) B. et al.: optically thick cone,

only the front is visible. (3) DP.: apparent width of filament $\sim$ 2''= 30 pc; (us): thickness of cone limbs (300 pc).

(5)-(10): hollow cones are mentioned.

(6) BT.: SE bubble is cone-like up to z = - 975 pc, $\Omega$ = 35 $\hbox {$^\circ $ }$ . (7) H. et al.: pointed, their Fig. 19; tilted by $\Theta$ $\approx$ 30-40 $\hbox {$^\circ $ }$ .

(8) G. et al: measured at z = 150 pc parallel to major axis; at smaller distances no line splitting.

(10) SBH.: $\Omega$ $_{\rm i}$ : inner cone, ${\it z} \la-350$ pc; $\Omega$ $_{\rm o}$ : outer cone.

(11) (us): at z = -750 pc parallel to major axis.

(12) (us): at z = -900 pc parallel to major axis.

(13) (us): derived from the image published by Devine & Bally.

(14) + (15) (us): B and $\Delta$ b extracted from published angular momentum diagrams.

(16) (us): B $_{\rm i}$ and B $_{\rm o}$ are the CO ring inner and outer diameter; $\Delta$ b = ( B $_{\rm o}$ - B $_{\rm i}$ )/2. Similar values follow from the data

published by Telesco et al. (1991), Achtermann & Lacy (1995), Weiß et al. (2001), and Mao et al. (2000).

**Table 1:** Cone opening angle(s) $\Omega$ , diameter of the outflow base B = 2 b, and cone wall thickness $\Delta$ b determined in earlier optical observations and recent radio observations.
Observation	Cone angle $\Omega$	Diameter	Cone Wall
	[ $\hbox {$^\circ $ }$ ]	at Base B [pc]	Thickness $\Delta$ b [pc]
Optical Observation
(1) Lynds & Sandage (1963)	"closed loops'' ( $\Omega$ = 120)
(2) Burbidge et al. (1964)	$\Omega$ $\approx$ 20	pointed
(3) Deharveng & Pellet (1970)	"loop''		30; 300
(4) Heckathorn (1972)	cone	pointed
(5) Axon & Taylor (1978)	cone
(6) Bland & Tully (1988)	"bubbles''	pointed
(7) Heckman et al. (1990)	$\Omega$ $_{\rm SE}$ = $\Omega$ $_{\rm NW}$ = 62	pointed
(8) Götz et al. (1990)	$\Omega$ = 30	B $_{\rm o}$ = 750
(9) McKeith et al. (1995)	$\Omega$ = 30	$\sim$ 500
(10) Shopbell et al. (1998)	SE: $\Omega$ $_{\rm i}$ = 5; $\Omega$ $_{\rm o}$ = 25	375-400
Derived by us from:
(11) Width Ellips (BT-88)			250
(12) Width Ellips (HAM-90)			200-400
(13) Thickness Filaments (DB-99)			150-200
Radio Observation (CO)
(14) Seaquist & Clark (2001)	$\Omega$ $_{\rm SE}$ = 90, $\Omega$ $_{\rm NW}$ = 40	$\sim$ 750	$\sim$ 300
(15) Walter et al. (2002)	$\Omega$ $_{\rm SE}$ = 55	$\sim$ 400	$\sim$ 250
Derived by us from :
(16) Neininger et al. (1998)		B $_{\rm i}$ $\approx$ 300; B $_{\rm o}$ $\approx$ 800	$\sim$ 250

Source LaTeX | All tables | In the text

SE: South-Eastern side of disk; NW: North-Western side of disk.
Remarks made by the authors or by us: (1) LS.: opening angle used in a model discussion. (2) B. et al.: optically thick cone,
only the front is visible. (3) DP.: apparent width of filament $\sim$ 2''= 30 pc; (us): thickness of cone limbs (300 pc).
(5)-(10): hollow cones are mentioned.
(6) BT.: SE bubble is cone-like up to z = - 975 pc, $\Omega$ = 35 $\hbox {$^\circ $ }$ . (7) H. et al.: pointed, their Fig. 19; tilted by $\Theta$ $\approx$ 30-40 $\hbox {$^\circ $ }$ .
(8) G. et al: measured at z = 150 pc parallel to major axis; at smaller distances no line splitting.
(10) SBH.: $\Omega$ $_{\rm i}$ : inner cone, ${\it z} \la-350$ pc; $\Omega$ $_{\rm o}$ : outer cone.
(11) (us): at z = -750 pc parallel to major axis.
(12) (us): at z = -900 pc parallel to major axis.
(13) (us): derived from the image published by Devine & Bally.
(14) + (15) (us): B and $\Delta$ b extracted from published angular momentum diagrams.
(16) (us): B $_{\rm i}$ and B $_{\rm o}$ are the CO ring inner and outer diameter; $\Delta$ b = ( B $_{\rm o}$ - B $_{\rm i}$ )/2. Similar values follow from the data
published by Telesco et al. (1991), Achtermann & Lacy (1995), Weiß et al. (2001), and Mao et al. (2000).