MAYERI OBSERVATIONES ASTRONOMICA. 221 
deprehendi poteft, num fixz an comiti vel utrique motus 
proprius tribuendis fit. 
Obfervationes omnes in plano meridiani quadrante mu- 
rali fa&te funt Manhemii in nova fpecula a me zdificata 
S. Electoris Palatini: eyus longitudo ad ortum Grenovicii 
eft fere 34’ 6" in tempore, latitudo fere 49° 27’ 50" 
Gaudebo maxime fi has meas obfervationes illuftriffime 
focietati haud ingratas accidifle intellexero, cujus benevo- 
lentiz me demififiime commendo. 
Iluftrifime ac celeberrimz Societati, 
Cuetor et fervus perpetuus, 
CHRISTIANUS MAYER, Sereniffimi 
Electoris Palatini et Ducis Bavariz Aftronomus. 
Manhemii in Germania, 
die 24 Aprilis 1778. 
(TRANSLATION.) 
To the illuftrious and celebrated Society of Sciences at 
Philadelphia, 
Curist1AN Mayer, Aftronomer to his Serene High- 
nefs the Elector Palatine, 
Wifheth Profperity. 
THOUGHT it my duty to embrace the opportunity 
I which my good friend the Rev. Mr. Ferdinand Farmer 
has procured me of writing to your illuftrious fociety, that 
I may make fome return to the honour which you have 
done me by electing and enrolling me among your mem-= 
bers. It gave me a very fenfible pleafure to find, by the 
printed volume of tranfaCtions, which you fent me about 
three years ago, that the {cience of aftronomy was culti- 
vated even at Philadelphia. That volume of yours, to- 
ae gether 
