222 



SCIENCE. 



[Vol. II., No. 29. 



Groombridge : Catalogue. — In First Eadcliffe cata- 

 logue. 



Bonn obs., vi. 



Heis: Atlas coelestis. — Annals Harv. coll. obs., ix. 



V. J. s. viii. 67, 278; ix. 236; xiii. 111. 



Herschel: Gen. cat. nebulae and clusters. — v. J. s. 

 1S6C, 176. 



Catalogue of 10,300 double stars. — v. j. s. 



1S76. 61. 



Jobnson: First Kadcliiie catalogue. — Bonn obs., 

 vi. 



Lacaille: Coelum australe stelliferum. — Bonn 

 obs., vii. 



Lalande: Catalogue. — Monthly not. K. A. S., xiv. 

 195. [This volume I have not access to at present.] 



Histoire celeste. — Bonn obs., vii. 



Observations of 1789-90. — Bonn obs., vi. 



Catalogue. — Cooper's Ecliptic stars, iv. 



Lamont: Catalogues {6 vols.) — v. j. s. ix. 94. 

 Main, R. : 2d Eadcliffe catalogue. — v. j. s. 1870, 



292. 

 Newcomb, S. : On the E. Asc. of the eq. fund, stars. 



— V. J. s. 1876, l.iS. 



Catalogue of 1,098 stars. — v. j. s. 1882, 259. 



Piazzi: Positiones mediae, 181-t. — Bonn obs., vi. 

 Riimker: 12,0(10 stars. — Bonn obs., vi. 



Cooper's Ecliptic stars, iv. 



Neuer folge. — Bonn obs., vi. 



Preliminary catalogue of southern stars. — 



Stone, Cape catalogue, 1880. 



Santini: First two catalogues. — Bonn obs., vi. 



Posizioni medie di 1,425 stelle. — v. j. s. 



1872, 13. 



Schjellerup : Al-Sufi's Uranometry. — Monthly not. 

 E. A. S., xliii. 266. 



10,000 stars. — Bonn obs., vi. 



SclionfeUl, E. : Catalog von veriinderlichen sternen. 



— V. J. s. 1866, 113. 



Zvveitei' catalog von veriinderlichen sternen. — 



V. J. s. 1875, 73. 



Stone, E. J.: Results of astronomical observations 

 at Cape of Good Hope, 1856-58. —V. J. s. 1875, 192. 



Cape ciitaloguo, 1880. —v. j. s. 1880, 297. 



Strasser: Milllere oerter von fixsternen. — v. J. s. 



1878, 88. 



Struve (W. ) : Positiones mediae. — Bonn obs., vi. 



Schjellerup's 10,000 stars, p. 225. 



Taylor: Madras catalogue. — Bonn obs., vi. ; Cape 

 catalogue, 1840; same, 1880. 



Astron. obs. at Madras, 1843-47. — v. j. s. 



1873, ISO. 



Vogel, H. C. : Positionsbestimmungen von nebel- 

 flecken, etc. —v. j. s. 1876, 276. 



Weisse's Bessel's Zones, +15° to — 15°. — Cooper's 

 Ecliptic stars, iv. 



Gould's Astronomical journal, iii. 115. 



[This contains all the errata of the Astr. nachr. up to 

 1853, June.] 



Annals Harv. coll. observatory, i., pt. ii., 



p. Iviii. 



Schjellerup's 10,000 stars, p. 225. 



Weisse's Bessel's Zones, + 15° to + 45°, p. 



xlv. 



"Catalogue." — Monthly not. E. A. S., xiv. 



195. [This volume I have not access to at present.] 



Wilson & Seabroke: Catalogue of measures of 

 double stars, —v. j. 8. 1877, 108. 



Yarnall: Catalogue U. S. naval obs. — v. j. s. 

 1880, 20. 



The search for Crevaux. 



Apropos of your recent weekly summary of the 

 progress of geography under the titles of the Death 



of Crevaux, etc., I may say that a member of the 

 French geographical society, M. Thouars, accom- 

 panied the U. S. solar eclipse expedition from Panama 

 to Callao, March 12-21, of this year. M. Thouars 

 had familiarized himself with explorations in South 

 America by extensive travels in Columbia and else- 

 where, and intended to penetrate the Pilcomayo 

 region, in search of the reUcs of the Crevaux expe- 

 dition, alone, or with only one companion, the two 

 disguised as Catholic priests. The attempt seems 

 foolhardy; and, for my part, I am glad to know that 

 M. Thouars intends to carry a revolver under his 

 priest's robe, and that he is a brave man and an 

 excellent shot. 



If he has not abandoned his daring project, we 

 should hear of him during the early part of 1884. 



Edward S. Holdex. 



Madison, Aug. 6, 1883. 



Occurrence of the swalloTW-tailed ha-wrk in Ne-w 

 Jersey. 



Early in the evening of July 28 I was standing on 

 the brow of the bluff overlooking the Delaware River, 

 near Bordentown, N.J., when my attention was 

 called to a large bird sailing in comparatively small 

 circles high overhead. Fortunately there was a 

 dark blue-black cloud behind it, so that I had an ex- 

 cellent opportunity to observe the bird. It was the 

 swallow-tailed hawk (Nauclerus forficatus). It re- 

 mained in nearly the same position for over an hour, 

 when it altered its flight, and, with steady wing- 

 strokes, flew rapidly in a north-west direction. 



The appeai'ance of this hawk here is one of the 

 rarest events in the experience of New Jersey orni- 

 thologists. Chas. C. Abbott, M.D. 



A reckless flier. 



One miglit think a tragic end would await such 

 birds as the Swifts, so bold and per.'-istent their flight; 

 and doubtless such is in store for many, though they 

 seem to .steer clear of most obstacles. 



A case in point came recently to hand, — that of 

 an unfortunate bird impaled to the spe.ir-poiiit of a 

 lightning-rod above a chimney. There it remained 

 until shot off with a gun, — a warning and a ghastly 

 one, indeed, to all this swift race. F. H. Heurick. 



Swallo'ws in Boston. 



I saw on the 4th of this month the tirst swallow in 

 Boston, at the extreme end of City Point, South 

 Boston. I have been on the lookout for them since 

 April. Two friends, good observers, report that 

 they have not seen one this season. 



Carl Reddots. 

 Boston, Aug. 7, 1883. 



'Has any one seen a swallow this summer in Bos- 

 ton?' inquires a correspondent in Science, Aug. 3. 

 Yes: I saw six last week, perched on the state-bouse. 

 Prior to this I had also raised the query. Whether 

 it was tlie pugnacious sparrows, or legislature, that 

 had banished these aerial visitors from the capilol, 

 their old haunt, was and is a query. 



Lbander Wethereli.. 



Boston, Aug. 11. 



WARD'S DYNAMIC SOCIOLOGY. 

 IV. 

 It is ]Mr. Ward's theory, that the more com- 

 plex sciences should be based upon the less 

 complex. This he avowedly derives from 



