168 National Geographic Magazine. 
In this table the calendar is Gregorian, the time is apparent or 
true sun time, the day is reckoned from noon and the hours are 
counted continuously through the entire 24. 
The present observatory in Bonn is in 
Latitude 50° 48’ 45’ N. 
Longitude 0° 28™ 23: EK. from Greenwich. 
At the date of the jirst eclipse Bering was on his way across 
the southern end of Kamchatka, from Bolsheretsk to Lower 
Kamchatka. This would make his position somewhere near lati- 
tude 55° N. and longitude 160° or 10" 40" E. from Greenwich. 
He was therefore 10° 12™ east of Bonn for which we have the 
elements of this eclipse as computed by Manfred. With this 
data together with the latitude and sun’s declination we have the 
following data for the eclipse in the region where Bering was. 
Beginning of eclipse -._-------- 4h 44m 
Middle of eclipse_-------------- 6 12 
End of eclipse __------------- Nar (ieee a4 
Sun sets ios a8 ee steno Sees 5 0% 
This means that the sun set, bearing about W. by 8. $S., and 
the moon rose in partial eclipse, bearing about E. by N. 3 N., at 
5" 07™ after apparent noon or 23 minutes after the eclipse had 
begun. The eclipse lasted for 2" 34™ after sunset, or until 75 41™ 
in the evening, thus rendering observation of the last contact 
plainly visible. 
At the date of the second eclipse of 1728, August 19, Bering 
was at sea somewhere in the vicinity of the strait which bears his 
name. Assuming his position to have been latitude 65° N. and. 
longitude 188° or 12" 32™ EK. from Greenwich, equal to 125 04™ E. 
from Bonn, and as before taking the data from Manfred’s ephem- 
eris we have as follows : 
Beginning of eclipse ..--... - 165 11™ 
Middle of eclipse _.__.---.---- 17 39 
End of eclipse _.___---_------- 19 07 
RS UNTA TTS OG i see AO ile ra eh AN Nae er a 16 04 
It thus appears that the first contact of this partial eclipse of 
the northern limb of the moon may have been just barely visible 
to Bering. The moon bearing about SW. by W. was entering 
the earth’s shadow about five minutes before the sun’s rising and 
its own setting. If much importance attaches to determining the 
possibility to Bering of observing this eclipse then a more precise 
calculation is needful. . . . 
