EEPORTS OF ASTRONOMICAL OBSERVATORIES. G27 



and tbey are fully occupied in duties of instruction in the Department 

 of Astronomy, Navigation, and Surveying-. The instruments are used 

 in the course of instruction, but regular observations are not made for 

 purposes of astronomical investigation. 



Battle Creek, Calhoun County, Michujau. 

 High School Observatory. 



Longitude from Washington, ? 



Latitude, ? 



Director: Arthur K. Bartlett (private observer). 

 Instruments : 



(«) Meridian circle : one ; aperture of objective, 4 inches ; for obser- 

 vations of the sun, aperture employed, 2 to 4 inches ; magnifying power 

 ordinarily employed, 75 diameters. 



(i) Miscellaneous : The only instrument at present used in the " Obser- 

 vatory" is a 4-inch achromatic telescope, which was purchased by the 

 board of education, about nine years ago, for the use of students and 

 teachers in the high school. It was manufactured by Pike, the New 

 Yorli optician, and is mounted upon a portable tripod stand, provided 

 with all the necessary adjustments. For the general observations of 

 astronomy, it is regarded as one of the best telescopes in this State. 



Bethlehem, Fennsyltmnia. 



Bethlehem Ohscrratory. 



Longitude from Washington, G™ 40M9 E 

 Latitude, 40° 36' 23".9 N. 

 Director : ? 



Brooklyn, New York. 

 Private Observatory. 



Longitude from Washington, ? 



Latitude, ? 



Director : G. P. Serviss. 

 Instruments : 



(c) Equatorial instrument: maker, John Byrne, New York; aper- 

 ture of objective, 3| inches ; magnifying powers of eye-pieces, 50 to 320. 

 By a double concave, or Barlow, lens of 6 inches focus these powers 

 are each about doubled, with slight loss of light. In use, five eye-pieces 

 and a prism. Also, a common spy-glass of If inches clear aperture, 

 used for counting sun-spots and other observations; power, 25 diam- 



