Prof. Evans on the Guernsey Co. (O.) Meteor of May 1, 1860. 35 
Berlin to the projection of the supposed path upon the earth is 
about 70 miles. 
€ may now proceed to correct this first approximation b 
combining the observations of Messrs. Mackley and Welles. We 
may assume that the path of the meteor for a short space, such 
as these two observers saw it traverse, could not have departed 
very far from a straight line; for it was moving in the highest 
regions of the atmosphere, and, according to any hypothesis, 
with immense velocity. Then the line which will best agree 
with the observations of both, and at the same time, when pro- 
jected on the earth, pass through New Concord, runs 40° west of 
north. Let. us first consider Mr. Welles’ observation: azimuth 
35° east of north, altitude 65°. The base line in this case (from 
Mr. Welles’ station to the supposed projection), is 19 miles ;: the 
consequent height 41 miles, nearly. This was at a point over 
the eastern part of Washington county, (6 on the map). Next 
take Mr. Mackley’s first observation: azimuth 55° east of north, 
altitude 30°. The base line in this case is 68 miles, and the 
consequent height (after allowing for the curvature of the earth), 
40 miles. This was over the southern part of Noble county, 
(@ on the map). Next consider Mr. Mackley’s second data: 
azimuth 40° east of north, altitude 28°. The base line is about 
_ 69 miles, and the resulting height 38 miles, nearly. This was 
over the northern border of Noble county, (e on the map). 
ow by comparing the distances between these stations with the _ 
corresponding differences of height, it will be seen that they are 
not far from proportional; which gives a trajectory between the 
above limits (from } to ¢ on the map) not aawian far from a 
Straight line, though descending somewhat more in the last part 
than in the first. But if we suppose the bearing to have been 
one or more degrees greater or less that 40° west of north, we — 
shall in like manner obtain, from the same observations, a tra- 
departing from a straight line altogether too rapidly to 
De admissible: in the one case, indeed, convex towards the earth; 
in the other case rising and falling successively within the limits _ 
of the atmosphere. us 
: path now found is consistent with Mr. Welles’ approx- 
imate estimate of the altitude (from 50° to 55°) at which the 
are described by the meteor would, when produced, cut the 
Meridian. In the statements of other witnesses we find as close 
agreement with those of Messrs. Mackley and Welles as could 
ne 
be expected, from ordinary observers of sudden and startl 
phenomena. In the neighborhood from eight to ten miles pe 9 
