54 VHILOSOPHICAL TRANSACTIONS. [aNNO 1724. 



An Account of the Aurora Borealis observed at Upsal. By M. Burrman. 

 N" 385, p. 175. Abridged from the Latin. 



M. Burrman relates the observations of such appearances that occurred 

 March 17, 1716, and Sept. 20, 1717. Those appearances were much of the 

 same nature as several that have been already described in these volumes, 



M. B. adds, that hence we may take occasion to consider further the optical 

 reasons of the phasnomena, with Descartes, cap. 7> parag. 18, de Meteoris. 

 Yet M. B. does not think that an accension of a more subtile sulphureous mat- 

 ter, in the lower region of the atmosphere, is entirely to be rejected in this 

 matter. For he himself observed a much greater variety of colours, with a 

 hissing noise, like the flame of a fire, at several other times, but especially in 

 the chasma of March 17, 1716, which was more remarkable in Sweden, for a 

 whole night together, than in England, France, Germany, or any where 

 else. 



Description of a Neiv Barometer. By M. Fahrenheit. N° 385, p. 179. 

 Translated from the Latin. 



To the cylinder ab, represented fig. 14, pi. I, is joined the tube bc, to 

 which an oblong ball cd is added, and to this the tube de of a very fine bore. 

 The cylinder, which can bear the heat of boiling water, is filled with a certain 

 liquor; the sensible degrees of heat in the air are measured in the tube ec by 

 means of the scale bc. If this thermometer be put into boiling water, the 

 liquor will not only fill the ball cd, but likewise rise to the different limits of 

 the tube de, according to the degree of heat, which the water, at the time of 

 making the experiment, will acquire from the gravity of the atmosphere. So 

 that, for instance, if, at the time of making the experiment, the height of the 

 mercury in the barometer be 28 London inches, the liquor in this thermometer 

 will reach the lowest place in the lube de : but if the gravity of the atmosphere 

 be equal to the height of 31 inches of mercury, the liquor will be raised by the 

 heat of the boiling water to the highest part of the tube de ; by means of the 

 annexed scale de, the different limits of the heat of the boiling water will be 

 denoted, not by degrees, but by the number of inches, by which the heiglit of 

 mercury in barometers is commonly measured. 



suggests) that the fontus had been lodged in the Fallopian tube; which, as it increased in size, it 

 distended until it burst the tube ; when it (the foetus) descended into the lower part of the abdomen, 

 and from thence passed, by the formation of an abscess, into the rectum. 



