THE 
C r o u n i a n Le&ures 
O N 
MUSCULAR MOTION. 
For the Years MDCCXLIV and MDCCXLV. 
Read before the 
ROYAL SOCIETY: 
By JAMES PARSONS, M. D. and Fellow 
of the Royal Society. 
Being a SUPPLEMENT to the ‘Philo fophical 
TranfafiHons for thofe Years. 
Mundi Pars efi Aer, & quidem necejfaria : hie efi enim qui Ccelum 
Terravique conneSIit. 
Senec. Nat. ghi. 1 . 2. c. 4. 
Animantes a.'tem adfpiratione aeris fnflinentur . Ip/e enim Aer 
nob/fium videt? nobifeum audit , nobifeum fonat y nihil enim [me eo 
fieri pot efi. 
Cic. de Nat. Deor. 1 . 2. c. 33. 
LONDON: . 
Printed for C. Davis, over-againft Gray’s-Inn- 
Gate in Holborn s Printer to the Roy al 
Society. 1745”. 
