Numb. 44i, 
philosophical 
TRANSACTIONS. 
For the Months of July, Auguft , and Septemb. 1736. 
The CONTENTS. 
I. A Catoptric Microfcope. By Robert Barker, 
M. T>. F. R. S. 
II. An Account of the Standard Meafures pre- 
fer ved in the Capitol at- Rome. By Martin 
Folkes, Efp V. T. R. S. 
III. Obfervationes nonnullx notatu non indigna:, 
Anno 1734. Ab Johanne Frid. Weidler, R.S. S. 
&c. Vitembergas fa&ae. 
IV. Obfervations made of the Latitude, Variation 
of the Magnetic Needle, and Weather, by Capt. 
Chriftopher Middleton, in a Voyage from Lon- 
don to HudibnVBay, Anno 1735. 
V. An Experiment to Jhew that fome Damps in 
Mines may be occafioned only by the burning of 
Candles under Ground, without the Addition of 
any noxious Vapour, even when the Bottom of 
the Bit has a Communication with the outward 
Air, ttnlefs the outward Air be forcibly driven 
in at the faid Communication or Ripe. By the 
Rev d J. T . Defaguliers, LLT). F. R. S. 
VI. A Chemical Experiment by Mr. John Maud, 
ferving to illuftrate the Phoenomenon of the in- 
flammable Air Jhewn to the Royal Society by 
Sir James Lowther, Bar 1 - as defer ibed in Philof. 
Tranfabt, Numb. 419. 
VII. A 
