76 PHILOSOPHICAL TRANSACTIONS. [aNNO 1/36. 



Vespasian. And there seems no doubt but Cossutius's foot was the foot in- 

 tended to be inscribed on this marble ; though that monument is itself now lost. 

 For the Greek foot, there seems to be no further mystery, than that it was 

 intended to be made to the Roman, in the proportion collected from Pliny, 

 which is, that 6'25 Roman feet made 600 Greek ; by which account the Greek 

 foot should contain 1007 of such parts as the Roman contains 967 ; and the 

 actual quantity Mr. F. took off, was 1006. 



Some Observations, made at fVittemberg in 1734. By John Fred. PFeidler, 



F. R. S. N" 442, p. 266. 



These observations, like those of former years, by M. Weidler, are chiefly 

 on the aurora borealis, the weather, &c. ; and no longer useful. 



Observations made of the Latitude, Variation of the Magnetic Needle, and 

 Weather, by Capt. Christopher Middleton, in a Voyage from London to 

 Hudson's Bay, Anno 1735. N° 442, p. 270. 



These observations are nearly alike with those before printed. Vol. vii, p. 465 

 and 617, of these Abridgments. 



An Experiment, to show that some Damps in Mines may be occasioned only by 

 the burning of Candles under Ground, without the Addition of any noxious 

 Vapour, even when the Bottom of the Pit has Communication with the out- 

 ward Air, unless the outward Air be forcibly driven in at the said Com- 

 munication or Pipe. By the Rev. J. T. Desaguliers, LLD., F. R. S. 

 N°442, p. 281. 



Exper. 1 . — In a cylindric glass-receiver, open at both ends, whose lower end 

 is plunged in water, and upper end covered with a plate, having a hole of near 

 an inch bore, a candle of 6 in the pound will not burn quite the time of one 

 minute, before it goes out. 



Exper. 2. — A candle will burn almost as long when the receiver is quite 

 covered. 



Exper. 3. — The receiver having the hole of the plate open, and a pipe at 

 bottom communicating with the external air, will burn but a little longer than 

 in the first experiment ; and by blowing in at the pipe with your mouth, it will 

 go out rather sooner. 



Exper. 4. — Blow in at the pipe with bellows, and the candle will burn as 

 long as you will. 



