’ 
428 FE. W. Morley— Oxygen in the Arr. 
eleven miles an hour. It seems almost certain that there must 
have been a descent of upper currents. The oxygen found on 
this morning was 0°20952, a fall of 0:00012. 
On February 28th, the oxygen here fell to 0:20947, but 
there is nothing in the map of et date suggesting any expla- 
nation. On the previous oe 2 wever, there were such condi- 
tions as seem to indicate that a elioisheg of. oxygen was to be 
expected. If from other evidence my theory should seem to 
bea on approximation to some law of nature, it will be sup- 
posed that some air deficient in oxygen, brought to the surface 
of the earth by the conditions prevailing on “the 27th, came to 
the observer here on the next day. But this is almost too pre- 
carious to be mentione 
On March 1st and 2d, ‘there was an area of high pressure over 
Lake Superior, with winds radiating around the observed third 
part of a circle. The oxygen found on these days was 0:20951 
and 0:20953. On the 3d, there was an area of low pressure 
and astorm of considerable violence over the Ohio valley, and 
the oxygen found promptly went up to 0°20967. 
On March 12th, there was an area of relatively high pressure 
over Lake Ontario, with a storm having its center of low press- 
ure in Kansas. Winds were directed away from Lake Ontario 
in all directions, the inference that there occurred a descent of 
upper currents is a reasonable one, and the oxygen found was 
020954, a fall of 0-00012. 
March 19th.—At this time there was an area of high pressure 
in Maine, and of low pressure over western Kentucky. The 
barometer was three-tenths lower at Cincinnati and four-tenths 
lower at Louisville than it was at Cleveland, with this high ba- 
rometric gradient, the winds were mach accelerated in passing 
over Cleveland toward the southwest, and it may be that ee 
currents were compelled to descend and mingle with t 
The oxygen found was 020960, a fall of 0-00008. 
On March 20th, there was an area of low pressure just east 
of Lake Michigan. The deficiency of oxygen is not explained 
by the weather map. ‘The same is also true of the 29th and 
80th. 
As far as I can see, it is impossible to discern any connection 
between the deficiencies of oxygen — and the direction 
of the wind at the time of taking the sam 
My own judgment, from the comparison ehiled, is, that the 
theory that deficiencies in the amount of oxygen in the atmos- 
phere are caused by the descent of air from an elevation fairly 
well agrees co the facts. 
