September 1, 1894.] 



KNOWLEDGE. 



216 



satellite at Oh. 4im. a..m., a transit ingi-esa of the first 

 satellite at Ih. 58ai. a. jr., a transit egress of its shadow 

 at 2h. 53m. a.m., a transit egress of the third satellite 

 at 3h. 29Ln. a.m., a transit egress of the first satellite at 

 4h. 14m. A.M. On the 27th an oocultatioa reappearance of 

 the first satellite at Ih. 23m. a.m., an eoUpse disappearance 

 of the second satellite at 8h. 2Gm. Is. a.m. On the 29th 

 a transit egress of the shadow of the second satellite at 

 Oh. llm. a.m., a transit ingress of the satellite at Oh. 22cQ. 

 a.m., and its transit egress at 2h. 58m. a.m. The following 

 are the times of superior and inferior conjunctions of the 

 fourth satellite with the centre of the planet : — Superior, 

 September 6tb Oh. 57m. a.m. ; September 22nd, 7h. 42m. 

 P.M. Inferior,, September 14th, lOh. 57m. a.m. Jupiter 

 is in quadrature with the Sun on the 28th, and during the 

 month he describes a direct path in Gemini, being about 

 i° north of ij Geminorum on the 1st, and about the same 

 distance north of /t Geminorum on the 16th. 



Saturn is invisible, and we defer an ephemeris of Neptune 

 till October. 



Uranus can still be seen, but must be looked for directly 

 after sunset. He sets on the 1st at 9h. 14m. p.m., with a 

 southern declination of 15° 7', and an apparent diameter 

 of 3-6". On the 30th he sets at 6h. 50m. p.m., with a 

 southern declination of 15° 32'. During the month he 

 describes a direct path in Libra, being a little to the S.E. 

 of ai a- Libra; at the end of the month. 



There are no well marked showers of shooting stars in 

 September. 



The Moon enters her first quarter at Ih. 3m. a.m. on the 

 7th ; is full (harvest Moon) at 4h. 21m. a.m. on the 15th ; 

 enters her last quarter at Oh. 32m. p.m. on the 22nd ; and 

 is new at 5h. 44m. a.m. on the 29th . She ia in apogee at 

 8h. A.M. on the 10th (distance from the earth 251,600 

 miles), and is in perigee at 6h. a.m. on the 26th (distance 

 from the earth 227,230 miles). At 8h. 21m. p.m. on the 

 7th the 6th magnitude star B.A.C. 4923 will make a near 

 approach to the lunar limb at an angle of 17°. At 9h. 8m. 

 P.M. on the 6th the 6i magnitude star B.A.C. 5603 will 

 make a near approach at an angle of 184°. At 6h. 5m. 

 P.M. on the 9th the 6th magnitude star B.A.C. 6628 will 

 disappear at an angle of 37°, and reappear at 7h. 4m. p.m. 

 at an angle of 307°. At 8h. 45m. p.m. on the 11th the 5^ 

 magnitude star x Capricorni will make a near approach to 

 the lunar limb (2i' distance) at an angle of 385°. At 

 Oh. 43m. A.M. on the 12th the 5i magnitude star <J) Capricorni 

 will disappear at an angle of 72°, and reappear at Ih. 50m. 

 A.M. (the star setting at the time) at an angle of 227°. At 

 Ih. 17m. A.M. on the 14th the 6th magnitude star 70 

 Aquarii will disappear at an angle of 88°, and reappear at 

 2h. 16m. A.M. at an angle of 200°. At 2h. 6m. a.m. on the 

 17th the 4th magnitude star c Piscium will disappear at an 

 angle of 353°, and reappear at 2h. 43m. a.m. at an angle of 

 298'. At 8h. 16m. p.m. on the 18th the 6th magnitude 

 star 27 Arietis will make a near approach at an angle of 

 334°. At 9h. 59m. p.m. on the 19th the 6^ magnitude 

 star 66 Arietis will make a near approach at an angle of 

 336°. At Ih. 28m. a.m. on the 20th the 6th magnitude 

 star 9 Tauri will disappear at an angle of 84°, and reappear 

 at 2h. 87m. a.m. at an angle of 225°. At 8h. 4m. p.m. on 

 the same day the 5^ magnitude star ^ Tauri will disappear 

 at an angle of 52°, and reappear at 8h. 49m. p.m. at an 

 angle of 276°. At Oh. 48m. a.m. on the 22nd the 6^ 

 magnitude star B.A.C. 1746 will make a near approach at 

 an angle of 168°, and at lib. 10m. p.m. the 5i magnitude 

 star 49 Aurigte will make a near approach at an angle of 

 356°. At Oh. 41m. a.m. on the 24th the 6th magnitude 

 star c Geminorum will disappear at an angle of 81°, and 

 reappear at Ih. 34m. a.m. at an angle of 287°. There will 



ha a partial eclipse of the Moon on the morning of the 

 15th, which will be partly visible at Green ivich. The 

 first contact with the peaucnbra takes place at 2h. Om. a.m., 

 with the shadoiv at 3h. 36ai. a.m. (exictly at ths northern- 

 most portion of the limb for direct image), the middle of 

 the eclipse at 4h, 32m, a.m. — mignitude (Moon's diameter 

 = 1) 0-225; la3t contact with shadow 5h. 27m. a.m. (angle 

 58° from north point towards the west). The Moon sets 

 at Greenwich eleven minutes later, the San rising at about 

 the same time. 



Erratum. — -"Face of the Sky for August," page 191, 

 column 1, line 9, for " llh. 52m.," read " lib. 52m." 



€1^(00 Column. 



By C. D. LooooK, B.A.Oxon. 



CoiiiMTjNioATioNs for tMs colunm should be addressed to 

 C. D. LococK, Burwash, Sussex, and posted on or before 

 the 12tb of each month. 



J. E. Gore. — It seems to us that economy of force baa 

 not been sufficiently studied in the two-movers enclosed. 

 Some of the pieces, too, appear to be unnecessary. 



Mrs. Baird and Messrs. B. G. Laws and W. De Morgan 

 are thanked for problems, which are marked for insertion 

 at an early date. 



W. Peniiett. — Thanks for the game, which is inserted 

 below. 



PROBLEMS. 

 By F. H. Guest (Smethwick). 



Black (4). 



White (4). 



White matea in two moves. 



Black (6). 



White (9). 



White mates in three moves. 



