180 FreLtp Museum oF NATURAL History — GEO.LoGy, VoL. III. 
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This record on the whole seems to indicate a comparatively uni- 
form supply of meteorites, which is the more remarkable when one 
considers the various chances affecting the observation of their fall. 
The record seems to afford no evidence of cycles or periodicity which 
can be traced with certainty. Still the record of years is perhaps not 
as satisfactory for establishing conclusions in this regard as is that 
of other periods. As the writer has shown elsewhere* at least goo 
meteorites probably reach the earth yearly. Of these only an 
average number of three is recorded, so that it is evident that a large 
allowance must be made for unrecorded ones. Yet itis fair to pre- 
sume that those recorded are typical of the whole, because while 
opportunities for observation of meteorite falls have probably con- 
tinually increased in number since 1800, the record by decades shows | 
that the decade from 1860 to 1870 considerably exceeded in number 
of falls either of the two succeeding ones. 
Passing from the falls by years, the falls by months may be ex- 
amined. Such an examination should have an especial significance 
in showing the relations which meteorites may have to well-known 
star showers. Two of the best known of these showers occur in 
August and November. If meteorites are related to these, these 
months should show a larger fall than others. If meteorites are not 
related to these, no special increase for these months should be shown. 
* Pop. Sci. Mon., 1904, pp. 351-354. 
