REPORTS OF ASTRONOMICAL OBSERVATORIES. 027 



and they are fully occupied iu duties of instruction in the Department 

 of Astronomy, Xavigatiou, aiul Surveying-. The instruments are used 

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

 purposes of astronomical investigation. 



liATTLE Creek, Calhoun Coioifi/, MkhUjan. 

 HUjli ^School Obscrvaionj. 



Longitude from Wasliington, ? 



Latitude, 1 



Director: Arthur K. Bartlett (private observer). 

 Instruments : 



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

 vations of the sun, aperture employed, 2 to 4 inches ; magnifying i)ower 

 ordinarily employed, 75 diameters. 



(/) MisceUaneoits : The only instrument at present used in the "Obser- 

 vatory" is a 4-inch achromatic telescoi)e, 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 Xew 

 York optician, and is mounted ui)on 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, Fenmylrania. 



Bethlehem Ohsercafory. 



Longitude from Washington, C™ 40M9 E 

 Latitude, 40° 30' 23".l) N. 

 Director : ! 



Brooklyn, Xew YorJc. 

 Private Observatory. 



Longitude from Washington, ! 



Latitude, "? 



Director : G. P. Serviss. 

 Instruments : 



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

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

 By a double concave, or Barlow, lens of C 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 1| inches clear aperture, 

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



