552 REPORTS OF AMERICAN OBSERVATORIES. 



petroleum engine; gramme machine; 17-inch induction coil; photo- 

 graphic apparatus. 



III. Observations during the past year: 



(a) The main work has been photography of the spectra of stars and 

 the planets especially, and a Lyrae, Arcturus, Jupiter, and the Moon. 

 The research on the presence of oxygen in the Sun has been continued. 



IV. Work proposed for the coming year : (1879-'80.) 

 Continuation of the above. 



VI. Additional information: 

 The results of the researches in this observatory have been printed in 

 the American Journal of Science, in the monthly notices of the Royal 

 Astronomical Society, the Comptes Iiendus of the French Academy of 

 Science, and the Journal of the Italian Spectroscopists. 



Location of observatory : (City) Haverford ; (County) Montgomery; 

 (State) Pennsylvania. 

 Name of observatory : Haverford College. 



Longitude from Washington, . 



Latitude, 40° 0' 3G".5. 



I. Personnel: 

 Director, Isaac Siiarpless. 

 Assistants : 1. William F. Perry, 



2. Josiah P. Edwards. 



II. Instruments: 



(a) Meridian circles : 2; diameter of circles, 2G inches; divided to — '; 

 read by 4 microscopes to 2"; aperture of objective, 4 inches. 



(b) Meridian transit instruments : Aperture, 1.} inches. 



(c) Equatorial instruments : Maker, Fitz ; aperture of objective, 8£ 

 inches ; magnifying powers of eyepieces, (50 to 900. 



(/) Chronographs : Bond's magnetic. 



{(j) Clocks: Meantime; maker, William E. Harper, Philadelphia; 

 1 sidereal; makers, no name. 



Prof. Samuel Alsop, the previous director of the observatory, has been 

 absent from duty during the past year on account of ill health. 



Location of observatory : (City) Iowa City ; (County) Johnson ; (State) 

 Iowa. 

 Name of observatory : C. W. Irish's Private Observatory. 

 Longitude from Washington, 57'" 52". 

 Latitude. 41° 39'^. 

 Authority for latitude aud longitude: Observations by self during 

 the past eleven years. 



