2 PHILOSOPHICAL TRANSACTIONS. [aNNO 1724. 



The specific gravity The degrees of 



Liquors. of liquors heated to heat acquired by 



^S degrees. boiling. 



Spirits of wine 8260 176 



Rain water 1 0000 '212 



Spirit of nitre J2935 242 



Lixivium of pot-ash .... J 5634 240 



Oil of vitriol 18775 546 



Volatile oils begin to boil with any degree of heat ; but their heat continually 

 increases by boiling; the reason of which may probably be this, viz. that the 

 more volatile particles fly oft', while the resinous ones, that have a greater at- 

 traction, reinain behind. 



But fixed oils require so great a degree of heat, that the mercury in the 

 thermometer begins to boil at the same time with them; and hence their degree 

 of heat can scarcely be found with certainty in the manner abovementioned. 



Excepting spirits of wine and water, probably the degrees of heat in the 

 other liquors, abovementioned, may likewise vary ; especially, if they be taken 

 in larger quantities, and boil for some time. 



Observations made in 1723, on the Barometer, Thermometer, Hygrometer y 

 &c. By Nicolaus Cruquius, Mathematician, and F. R. S. N° 381, p. 4. 

 Abridged from the Latiri. 



In 1723 M. Cruquius made some accurate observations at Leyden, Delft, 

 and Rheinburg, on the height of the barometer, thermometer, and hygrome- 

 ter; also the quantity of rain, dew, snow, hail, and the quantity of water 

 exhaled, &c. viz. Of the barometer, the greatest height 2g inches 8 lines, the 

 least height 27 inches 7 lines, and the mean 29 inches: of the thermometer, 

 the greatest degree of cold, or least height 1000 degrees, the freezing point 

 of water at 1070, the boiling point of the same 1510, and the inean 1113: 

 the water exhaled or evaporated 28 inches 11 lines: the rain, dew, snow and 

 hail, at Delft 20 inches, and at Kheinburg 21. 



An Account of a Dropsy in the left Ovary of a Woman, aged 58, cured by 

 a large Incision made in the Side of the Abdomen. By Dr. Robert Hous- 

 toun. N°381, p. 8. 



The subject of this history was a poor woman aged 58. In her last lying-in, 

 at 45 years old, the midwife having violently pulled away the burthen, slie was 



