X CONTENTS. 



Page. 



XXXV f — Explanation of an Apparatus, 

 suggested by Colonel Yule, for 

 Discharging Ordnance upon - 

 Mr Forsyth's Plan; and an 

 Account of some Experiments 

 performed with it. By Mr John 

 Deuchar, ...472 



XXXVI. — Description of two New Philoso- 



phical Instruments. By Mr 

 Alexander Adie, I ....... A83 



XXXVII. — Description of an Instrument 



for ascertaining the Specific 

 Gravity of Bodies, without the 

 Use of Weights or Calculation. 

 Mr Adie, 495 



XXXVIII. — Continuation of an Account of 



some Experiments performed 

 with an Apparatus for Dis- 

 charging Ordnance, without the 

 Use of a Light or Match-lock ; 

 in which several Inferences are 

 drawn with regard to the Nature 

 (ind Source of the Flame. By 

 Mr Deuchar, 499 



