Popular Science Monthly/Volume 10/March 1877/Size of the Principal Telescopes in the World

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SIZE OF THE PRINCIPAL TELESCOPES IN THE WORLD.

IN Les Mondes, January 20, 1876, appeared a list of the principal telescopes of the world, with their apertures and focal lengths. It was defective in regard to its enumeration of American telescopes, and in other respects, as all such lists must be. We have compiled from it, and from other sources available, a larger list, which is itself manifestly incomplete, but which will give a better idea of the number of telescopes available, or soon to be available, for astronomical purposes. It is a melancholy fact that the return from so many instruments, that is, the interest from so much astronomical capital, is not so great as it should be, and it suggests the question as to whether future benefactors of American colleges, for example, will not do better to provide astronomers to use the telescopes already constructed than observatories in which to put new ones. In the second column, the first name is that of the maker of the objective or speculum, the second that of the engineer who mounted the telescope.

I. Reflectors.

"One French inch = 12 Paris lines; one English inch = 11.26 Paris lines; one metre = 443.30 Paris lines.

OWNER OR DIRECTOR, AND OBSERVATORY.	Constructed by	APERTURE.			FOCAL LENGTH.			Remarks
OWNER OR DIRECTOR, AND OBSERVATORY.	Constructed by	English Inches, etc.	French Inches.	Metres	English Feet etc.	French Feet etc.	Metres.	Remarks
Lord Rosse, Birr Castle	Rosse	6 ft.			55 ft.
Wm. Herschel, Slough	W. Herschel	4 "			40 "			Out of use.
Lassell, Liverpool, etc.	Lassell	4 "			37 "			Destroyed.
Ellery, Melbourne	Grubb	4 "			32 "
Le Verrier, Paris	Martin, Eichens			1.20			7	Silvered glass
Lord Rosse, Birr Castle	Rosse	36 in.
Tisserand, Toulouse	Foucault			0.80				Silvered glass.
Stephan, Marseilles	Foucault, Ei- chens			0.80			4.8	Silvered glass.
H. Draper, near N. York	H. Draper	28 in.			13 ft.			Silvered glass.
Lassell, Maidenhead	Lassell	24 "			20 "			Metal.
W. & J. Herschel, Slough and Cape Good Hope	W. & J. Herschel	15 "						Several mirrors.
H. Draper, near N. York	H. Draper	15 "
Maclean, Turnbridge Wells	With & Brown- ing	15 "
Pritchard, Oxford	De la Rue	13 "			10 ft.
Worthington and Raven- dell, Manchester	With & Brown- ing	13 "
Hirst, New Zealand	Browning	8½						Silvered glass.

and many others.

II. Refractors.

OWNER OR DIRECTOR, AND OBSERVATORY.	Constructed by	APERTURE.			FOCAL LENGTH.			Remarks
OWNER OR DIRECTOR, AND OBSERVATORY.	Constructed by	English Inches, etc.	French Inches.	Metres	English Feet etc.	French Feet etc.	Metres.	Remarks
Lyman, Yale College	A. Clark & Sons.	28						Constructing
Littrow, Vienna	Grubb	27						Constructing.
McCormick ?	A. Clark & Sons.	26¼			33 ft.
C. H. Davis, Washington	A. Clark & Sons.	26			390 in.
Newall, Gateshead	Cooke	25			29 ft.
Buckingham, London	Buckingham
University of Chicago	A. Clark & Sons.	18.5			23 ft.
Winnecke, Strasbourg	Merz		18					Constructing
Pickering, Harvard Coll.	Merz	15			23 ft
O. Struve, Pulkova	Merz	14.93			270.6
Lord Lindsay, Dun Echt.	Grubb	15			15 ft.
Huggins, London	Grubb	15
Downsede College, Bath		15.5						Destroyed by fire in 1867.
Cooper, Markree Castle	(?)	14			25 ft.
Oom, Lisbon	Merz		14
C.H.F. Peters Clinton.	Spencer	13.5			16 ft.
Boss, Albany	Fitz	13			182 in.
Rutherford, New York.	Rutherford	13						Photographic.
Langley, Pittsburg.		13
Watson, Ann Arbor.	Fitz	12.5			17 ft.
Airy, Greenwich.	Merz & Simms.	12.5			16.6
Mitchell, Vassar College.	Fitz, reworked by Clark	12.33
Pritchard, Oxford.	Grubb.	12.25
Pritchett, Glasgow, U.S.	A. Clark & Sons.	12.25			17 ft.
Le Verrier, Paris.	Secretans & Ei chens		12				5
Littrow, Vienna.	A. Clark & Sons.	12
Adams, Cambridge.	Cauchoix	12			20 ft.
Ball, Dublin.	Cauchoix	12?	12?
H. Draper, near N. York.	A. Clark & Sons.	12
Main, Oxford.	Cauchoix	12?	12?
Pritchard, Oxford.	Grubb	12
Le Verrier, Paris				0.82
White, Brooklyn.	Fitz, reworked by Clark	11⁷⁄₈
Stone, Cincinnati	Merz	11.5			17 ft.
Von Bülow, Bothkamp	Schroeder		11			16
Lamont, Munich	Merz		10.5			15
Schjellerup, Copenhagen	Merz		10.5			15
Van Vleck, Middletown, US	A. Clark & Sons	11
——, Florence	Amiel		11
Oom, Lisbon	A. Clark & Sons.							Photographic
Rutherford, New York	Rutherford and Fitz		10.5					Photographic
D’Aguillar, Madrid	Merz		10
Bredichin, Moscow	Merts, reworked by Clark		10			16
Mitchie, West Point	Fitz, reworked by Clark	10			14 ft.
Stephan, Marseilles	Eichens			0.25			3
Barclay, Leyton	Cooke	10			12 ft.
Fletcher, Cumberland		10			12 "
——, Dorpat	Fraunhofer	9.62				14
Förster, Berlin	Merz	9.62				14
Secchi, Rome	Merz	9.62				14
Tacchi, Palermo	Merz	9.62				14
Kowalski, Kazan	Merz	9.62				14
C. H. Davis, Washington	Merz, reworked by Clark	9.62
Lefont, Calcutta	Steinheil	9.62			12 Ft.
Pogson, Madras	Lerebours and Secretan	9	9?
Buckingham, London	9	9?
Young, Dartmouth	A. Clark & Sons.	9.38			12 ft.
Grant, Glasgow		9
Crosley, Halifax	Cooke	9.33
Edgecomb, Hartford	A Clark & Sons.	9.4	9
Schultz, Uppsala	Steinheil
Barneby, Worcester	Cooke	9
Bruhns. Leipsic	Steinhell, Pistor		8			12
Menten, Quito	Merz		9			117

II. Refractors.—(Continued).

OWNER OR DIRECTOR, AND OBSERVATORY.	Constructed by	APERTURE.			FOCAL LENGTH.			Remarks
OWNER OR DIRECTOR, AND OBSERVATORY.	Constructed by	English Inches, etc.	French Inches.	Metres	English Feet etc.	French Feet etc.	Metres.	Remarks
Stoneyhurst College		8
Wilson, Rugby	A. Clark & Sons.	8.25
——, Florence	Amiel			8
Erek, Ireland	A. Clark & Sons.	8				75 in.
Ashe, Quebec	A. Clark & Sons.	8				9 ft.
Hartnup, Liverpool	Merz	8			12 ft.
Lyman, Yale College		8.25
U.S. Naval Academy	A. Clark & Sons.	7.75
Esty, Amherst College	A. Clark & Sons.	7.25			101 in.
Bishop, London	Dollond	7			11 ft.
Knott, ——	A. Clark & Sons.	7.33			9.4
Birt, London		7.5
Leeson-Prince ——	Tulley	7			12 ft.
Russell, Sydney	Merz	7			9.66
Main, Oxford	Repsold	7.5			10.5			Heliometer
Williams College, U.S.	A. Clark & Sons.	7⅛
——, Naples	Fraunhofer		7
O. Struve, Pulkova	Merz		7					Heliometer
Hansteen, Christiana	Merz		7
Kaiser, Leiden	Merz		7
Dembowski, Florence	Merz		7
Russell, Sydney	Merz		7
Luther, Königsberg	Fraunhofer and Merz		70.24			1,1341		Heliometer
——, Capstadt	Merz	6 5
Wendell, Bates College U.S.	A. Clark & Sons.	6.25
Moore, Lynn. U.S.	A. Clark & Sons.	6.25
Burnham, Chicago	A. Clark & Sons.	6
Lee, Hartwell	Tulley	6
Lockyer, London		6.25			8.5
Mouckhoven, Genth	Cooke	6			7.5
Lord Lindsay, Dun Echt.	Cooke	6			6
——, Madras	Dollond	6?			5
Wolf, Zürich	Dollond	6	6?			8
Schmidt, Athens	Dollond	6	6?
Schoenfeld, Bonn			6					Heliometer
Moesta, Santiago	Young, Fitz		6.4			103.7

High School, Philadelphia	Merz		6			8 ft.
Trouvelot, Cambridge	Merz		6			8.5?
Peek, Columbia College	A. Clark & Sons.	6
Durham University	Ross	5
——, Lucknow	Troughton	5.5
Broun, Trevandrum	Dollond	5			7.5
U.S. Transit Venus Com.	A. Clark & Sons.	5			5 ft.			8 instruments.
Loomis, Yale College.	Dollond	5			10 "
Curley, Georgetown	Simms	5			80 in.
Pickering, Harvard Coll.	Merz		4		5 ft.
Luther, Bilk			4
Tebbutt, New S. Wales.		4.5
Bruhn, Leipsic				0.117			1.96
Lord Lindsay, Dun Echt.	Repsold		4					Heliometer
Carrington, Red Hill.	Simms	4.5			4.3

and many others.