REPORTS OF ASTRONOMICAL OBSERVATORIES. 643 



Hudson, Summit Coundj, Ohio. 



Hudsou Observatory. 



Longitude from Washinoton, 17'" 32^0() W. 



Latitude, 41° 14' 42".G N. 



Authority for latitude and longitude : Professor J^^lias Loomis, LL. D. 



Director, Charles J. Smith. 



Instruments : 



(a) Meridian circle: one; maker, Soois, of London; diameter of 

 circles, 18 inches; divided to 5'; read by 3 microscopes to 1"; ai)erture 

 of objective, 3 inches. 



Equatorial imtrument: one; maker, Simms ; a])erture of objective, 4 

 inches ; magnifying powers of eye-pieces, 50, 100, 150, 250, 350. 



Cloclc: sidereal; maker, Molineux; mercurial pendulum. 

 Observations during the past year : 



1^0 systemati*; course of ol)servatious pursued. Instruments used 

 only for purposes of instruction. 



Iowa City, Johnson County, Iowa. 



Private Observatory. 



Longitude from Washington, 57'" 52*^ W. 

 Latitude, 41o 39'.8 N. 



Authority for latitude and longitude: Observations made a»^ jhQ- 

 observatory during the past eleven years. 

 Director: C. W. Irish. 

 Assistants : Mrs. C. W. Irish ; 

 Miss Lizzie Irish ; 

 Miss Ruth Irish ; 

 Dr. C. M. Hobby. 

 Instruments : 

 (b) Meridian transit instrument: a small ono made by the director 

 himself; aperture, one inch; magnifying power, 11 diameters. 



(6') Equatorial instrument: maker, Chevalier, Paris; aperture of 

 objective, 4 inches; magnifying powers of eye-pieces, 25 to 300. 

 (/) Chronograph : a Morse register. 



(//) Cloclc: one meantime; beating three-q^iarter seconds : of German, 

 make. 



Work proposed: 

 Observation of the coming transit, of Mercury, if business occupa- 

 tions i^ermit. 



