14 



TRANSIT OF MERCURY. 



Wind impairs 

 the effedl of 

 telcfcopet. 



Wcatlier appa- 

 rently fine but 

 unfavourable. 



Windy Weather. 



(51.) Jan. 8, 1783. It is very windy. The diameters oi' 

 the ftars are flrangely increaled, even thofe at 60 and 70° of 

 altitude. Every ftar feems to be a little planet. 



(32.) Jan. 9, 1783. Wind incrcafes the apparent diameters 

 of the ftars. 



(33.) Sept. 20, 1783. The night has been very windy ; 

 and I do not remember ever to have feen fo ill, with fuch a 

 beautiful appearance of brilliant ftar-light. 



Fine in Appearance. 



(34.) May 28, 1781. The evening, though fine in ap* 

 pearance, is not favourable. No inftrument I have will a6l 

 properly. The wind is in the eaft. 



(35.) Auguft 30, 1781. The ftars appear fine to the naked 

 eye, fo that I can fee e Lyrae very diftindly to be two ftars ; 

 yet my telefcope will (how nothing well. There are flying 

 clouds, which, by their rapid motion, indicate a difturbance in 

 the upper regions of the air ; though, excepting now and then 

 a few gufts of wind, it is in general very calm. At a diftance 

 there are continual flafties of lightning, but I can hardly hear 

 any thunder. 



(36.) Sept. 14, 1781. I fee very fmall ftars with the naked 

 eye ; but the telefcope will not adl fo well as it fhould. 



(37.) Sept. 24, 1781. The evening is apparently fine ; but, 

 with the telefcope, I can fee neither r> Coronae nor ft Bootis 

 double ; nor indeed can I fee any other ftars well. 



(38.) Auguft 24, 



Vicinity of a 



building renders g^d 910, but faw it very indifTerently 

 the ftars indif- , •' •' 



houle. 



Over a Building. 



783. I viewed t Bootis with 449,737, 

 The ftar was ovar a 



tind ) 



(39.) Oa. 26, 1780. t Bootis being near the roof of ^^ 

 houfe, I faw it not fo diftinflly as I could wiQi. 



The Telefcope lately brought out. 

 Recent expofure (40.) 0^.10, 1780. 6*" 30'. Having but juft brought out 



iiftindlnefs. 6'^ 45'. The tube and fpecula are now in order, and per- 



form very well. 



2 (41.) Jan, 



