
256 _ Mr, Herscuen’s Objervations : 
1781, July 3. 19h. 54’. a feems to be va than I have 
feen 1 it, fig. 6. . . 
r1h. 24’. 6 is not yet vifible, fis. a 
"Ez h. 36’. T perceive part of 4, fig. 8. 
July 4. 12h. 9. @ is very full; 6 extremely thin, and 
barely vifible. 
12h. 18’, a and 3 are not quite oppofite each other. 
12h. 49’. 4 is increafed. 
Vay £4. 0.0. Sa. 4 15 vaibles fac.o. 
rth, 35’. dinvifible. 
‘72h. 12’. } not to be feen. | 
July 16. 11h. 9’. The bright {pot a is very large. 
Jlyg em. Ak ye ee No other, bright fpot but ae 
July 19. 13h. 31’. 2 vilible: | 
July 20. 10h. 3”. Tfuppofe the bright ae a on Mars 
is, very nearly, the fouth pole; which, therefore 
mutt lie in fight. “There is no fecond bright {pot 6 
~ vifible to night. ; - 
10h. 56’ 6 not vifible; the night very fine. 
July 22. 11h, 14’. At @ and 4, fig. ro. are bright 
fpots; a is larger than 4. Moft probably the fouth 
pole is in view, and the north pole juft hid from our 
fight. If the {pots are polar, or nearly fo, then @ 
muft, on a fuppofition of the fouth pole’s being in 
view, appear larger than 4; and if d extend a little 
more from the north pole one way than another, it 
mutft be fubjeét to fome change in its appearance from 
the revolution of Mars on its axis. 
July 30 gh. 43’. Both {pots vifible. + 
Auguft 8. 10h. 4’. Only a vifible, fig. II. 
Auguft'17. 9h. 21’, Only a in fight. : 
3781, 
