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THE POPULAR SCIENCE MONTHLY.
II. Refractors.—(Continued).
| OWNER OR DIRECTOR, AND OBSERVATORY. |
Constructed by | APERTURE. | FOCAL LENGTH. | Remarks | ||||
| English Inches, etc. |
French Inches. |
Metres | English Feet etc. |
French Feet etc. |
Metres. | |||
| 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.
| THE JOURNEYINGS AND DISPERSAL OF ANIMALS. |
IN his recent elaborate work on the "Geographical Distribution of Animals," Mr. Alfred Russel Wallace gives much attention to the subject of migrations as among the means of dispersion, and from his copious treatment of the subject, and various other sources, we glean the following brief particulars upon this subject:
