Numb. 4if. 
• ^ -*• * ^ -*• ^ K^r ' I I 
PHILOSOPHICAL 
TRANSACTIONS 
For the Months of September and October y 17 31. 
The CONTENTS. 
I. An Account of ObJerVations made on 'Board the 
Chatham- Yacht, Auguft 30 th and 3 xji, and 
September \Jl, 1732, in purfuance of an Or- 
der made by the (Right Honourable the Lords 
Commiffi oners of the Admiralty , for the Trial of 
an Inftrument for taking Angles, defcribed in 
Philofophical Tranfa£tions, Thumb . 420. 
By John Hadley, Effo Vice-Brefident of the 
Royal Society. 
II. EPHEMERIDES METEOROLOGICAL, 
Barometrical, Thermometricae, Epidemics, 
Magnetics, ULTRAJECTINAL, confcripta 
a Petro Van Mufchenbroek, L. A. M. Med . 
iff" (Phil. T>. (phil . & MatheJ. Rrofeff. in Acad. 
Ultra). Anno 1729. 
HI. A 
