128 Mr. hehsciiel’s Ajlronmlcal Obfervations 
Obfervations on Mars in the year 1779. 
May 9th. Clock 1 5 v too faff; by equal altitudes on the 
14th of April, and by the tranfit of a ffar, is found to lofe 
1 ' ? 4 5 P er day* 
1 1 h. 1' by the clock, I found the fituation of the fpots on 
Mars as in figure 20 ; there is a very remarkable dark fpot not 
far from the center. 
1 1 h. 30k The figures are gone from the center. 
May 1 1 . Clock 1 2" too faff. 
I oh. 1 8b The fame fpot that was vifible May 9. is on the 
difk, the darkeff place being intirely fouth-eaff of the center, 
fee fig. 21. 
I I h. 43b The darkeff part is almoff arrived at the center, 
fig. 22. 
1 2 h. 17b The dark fpot is with its edge juft near the center, 
as in fig. 23. 
May 13. Seven- feet refleftor ; power 222. Clock 9" too faff. 
11 h. 26b Mars feems now to be in the fame fituation he 
was the 1 ith, at 10 h. 8 b 
May 22. Clock 4" too flow. 
1 7 h. 5b The figure of May nth is not on the difk; but 
fome other fainter fpots are vifible. The air is full of vapours. 
June 6. The clock fet by ten equal altitudes taken to-day, 
and by the tranfit of $ Scorpii lofes i",9 per day. What I have 
perhaps improperly called a tranfit is the occultation of a ffar 
palling behind the perpendicular edge of a high building at 
about 40 yards diffance, obferved with a fixed telefcope difeded 
to the place where it vamfhes. 
10 h. 10b The fame figure is upon the difk of Mars which 
was there April 8, 1777, at 7 h. 30 . 
June 
