280 OC. A. Young—The Solar Eclipse. 
00°6”, long. 14 51™ 45-2 west of Washington, according to the 
data kindly furnished by the Coast Survey, the position of the 
pier of our equatorial was, lat. 839° 43’ 27”, long. 1" 51™ 40*-4 
west of Washington. The other instruments were all within 
150 feet of this. Our equipment was as follows: For time, we 
had a sidereal box chronometer, with electric break circuit, by 
Parkinson & Frodsham, No. 4121; also a mean time pocket 
chronometer by the same makers, No. 5450. The rates of both 
were small and very regular. Their errors were determined 
every fair day by altitudes of the sun measured with a Pistor & 
Martin’s prismatic sextant and artificial horizon. It was only 
rarely that we could get equal altitudes in morning and after- 
noon, as the afternoons were usually cloudy even when the 
mornings were fine. For chronographs we had two Morse 
reg 
of the sun. ( comet-seeker by Fitz, six inches aperture 
and about forty-six inches focus, with a curious arrangement 
of two eyepieces: power 195. This was mounted upon a tri- 
spectroscope, and fluorescent eyepiece, having a film of solution 
of Aiseulin about Imm. thick. 
the ordinary solar spectrum could be easily seen as far as O, 
and with precautions I could see even farther. The eyepiece 
could be set axially as well as obliquely. I used this instra- 
