# 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.
| OWNER OR DIRECTOR, AND OBSERVATORY. | Constructed by | APERTURE. | APERTURE. | APERTURE. | FOCAL LENGTH. | FOCAL LENGTH. | 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. | APERTURE. | APERTURE. | FOCAL LENGTH. | FOCAL LENGTH. | 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 | 11$^7$⁄$_8$ | | | | | | |
| 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. | APERTURE. | APERTURE. | FOCAL LENGTH. | FOCAL LENGTH. | 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.