212.宇宙中有多少个黑洞？

212.宇宙中有多少个黑洞？

Lippincott's Monthly Magazine was a 19th-century literary magazine published in <a href="https://en.wikipedia.org/wiki/Philadelphia" target="_blank" rel="noreferrer noopener">Philadelphia</a> from 1868 to 1915, when it relocated to New York to become <a href="https://en.wikipedia.org/wiki/Robert_M._McBride" target="_blank" rel="noreferrer noopener">McBride's Magazine</a>. It merged with <a href="https://en.wikipedia.org/wiki/Scribner%27s_Magazine" target="_blank" rel="noreferrer noopener">Scribner's Magazine</a> in 1916.Lippincott's published original works, general articles, and literary criticism. It is indexed in the Reader's Guide Retrospective database, and the full-text of many issues is available online from Project Gutenberg, and in various commercial databases such as the American Periodicals Series from <a href="https://en.wikipedia.org/wiki/ProQuest" target="_blank" rel="noreferrer noopener">ProQuest</a>.<a href="https://en.wikipedia.org/wiki/File:Lippincott%27s_Monthly_Magazine_advertisement_in_The_Black_Cat_of_April_1912.jpg" target="_blank" rel="noreferrer noopener"></a>Lippincott's Monthly Magazine advertisement in <a href="https://en.wikipedia.org/wiki/The_Black_Cat_(US_magazine)" target="_blank" rel="noreferrer noopener">The Black Cat</a> of April 1912Lippincott's was published by J. B. Lippincott of Philadelphia until 1914, then by McBride, Nast &amp; Co. There were 96 semi-annual volumes. From 1881 to 1885 they were issued as vols. 1 to 10 "New Series" or "N.S." (see image) and bound such as "Old Series, Vol. XXVII – New Series, Vol. I" (January to June 1881) but the old series was resumed with January 1887 issued as volume 37, number 1.

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Lippincott's Monthly Magazine was a 19th-century literary magazine published in Philadelphia from 1868 to 1915, when it relocated to New York to become McBride's Magazine. It merged with Scribner's Magazine in 1916.Lippincott's published original works, general articles, and literary criticism. It is indexed in the Reader's Guide Retrospective database, and the full-text of many issues is available online from Project Gutenberg, and in various commercial databases such as the American Periodicals Series from ProQuest.Lippincott's Monthly Magazine advertisement in The Black Cat of April 1912Lippincott's was published by J. B. Lippincott of Philadelphia until 1914, then by McBride, Nast & Co. There were 96 semi-annual volumes. From 1881 to 1885 they were issued as vols. 1 to 10 "New Series" or "N.S." (see image) and bound such as "Old Series, Vol. XXVII – New Series, Vol. I" (January to June 1881) but the old series was resumed with January 1887 issued as volume 37, number 1.

Lippincott's Monthly Magazine&nbsp;was a 19th-century literary magazine published in&nbsp;<a href="https://en.wikipedia.org/wiki/Philadelphia" rel="noopener noreferrer">Philadelphia</a>&nbsp;from 1868 to 1915, when it relocated to New York to become&nbsp;<a href="https://en.wikipedia.org/wiki/Robert_M._McBride" rel="noopener noreferrer">McBride's Magazine</a>. It merged with&nbsp;<a href="https://en.wikipedia.org/wiki/Scribner%27s_Magazine" rel="noopener noreferrer">Scribner's Magazine</a>&nbsp;in 1916.Lippincott's&nbsp;published original works, general articles, and literary criticism. It is indexed in the Reader's Guide Retrospective database, and the full-text of many issues is available online from Project Gutenberg, and in various commercial databases such as the American Periodicals Series from&nbsp;<a href="https://en.wikipedia.org/wiki/ProQuest" rel="noopener noreferrer">ProQuest</a>.<a href="https://en.wikipedia.org/wiki/File:Lippincott%27s_Monthly_Magazine_advertisement_in_The_Black_Cat_of_April_1912.jpg" rel="noopener noreferrer"></a>Lippincott's Monthly Magazine advertisement in&nbsp;<a href="https://en.wikipedia.org/wiki/The_Black_Cat_(US_magazine)" rel="noopener noreferrer">The Black Cat</a>&nbsp;of April 1912Lippincott's&nbsp;was published by J. B. Lippincott of Philadelphia until 1914, then by McBride, Nast &amp; Co. There were 96 semi-annual volumes. From 1881 to 1885 they were issued as vols. 1 to 10 "New Series" or "N.S." (see image) and bound such as "Old Series, Vol. XXVII – New Series, Vol. I" (January to June 1881) but the old series was resumed with January 1887 issued as volume 37, number 1.

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212.宇宙中有多少个黑洞？

212.宇宙中有多少个黑洞？