4 PHILOSOPHICAL TRANSACTIONS. [aNNO 1665. 



till M. Auzout first attempted to foretel the line of motion of the comet 

 Anno 1664 ; exhibiting an ephemeris, in which he determines for every day its 

 place in the heavens, the hour of its coming to the meridian, and that of its 

 setting, until its too great distance, or its approach to the sun, should hide it 

 from our eyes. This ephemeris is founded on the supposition of its moving 

 justly enough in the plane of a great circle, inclined to the equinoctial about 30°, 

 and to the ecliptic about 49° or 49§°, cutting the equator at about 45^°, and 

 the ecliptic at 28° of Aries, or a little more. Then M. Auzout proceeds to show 

 how the motion of this comet is to be traced on the globe, and to calculate the 

 several places of its appearance in the heavens; and in particular, he finds by his 

 calculations what the least distance of the comet from the earth should be, when 

 it is in opposition to the sun; a circumstance that may serve, as he thinks, to 

 decide the grand question concerning the motion of the earth. 



^71 Experimental History of Cold. By the Hon. Robert Boyle* 



N'l.p.S. 



The chief heads of this work are, 



1 . Experiments touching bodies capable of freezing others. 



2. Experiments and observations touching bodies disposed to be frozen. 



3. Experiments touching bodies indisposed to be frozen. 



4. Experiments and observations touching the degrees of cold in several 

 bodies. 



5. Experiments touching the tendency of cold upwards or downwards. 



6. Experiments and observations touching the preservation and destruction 

 of eggs, apples, and other bodies by cold. 



7. Experiments touching the expansion of water and aqueous liquors by 

 freezing. 



8. Experiments touching the contraction of liquors by cold. 



9. Experiments in consort, touching the bubbles, from which the levity of 

 ice is supposed to proceed. 



10. Experiments about the measure of the expansion and the contraction of 

 liquors by cold. 



* The Honourable Robert Boyle, son of Richard earl of Cork, was born Jan. 1627:, and died 

 Dec. 1691. He was one of the first founders of the Philosophical Society, and the Royal Society, 

 to which he continued, through the whole course of a long and active life, one of the most usefiil of 

 its members, by his numerous and valuable communications, and other services. A more ample ac- 

 count of the life and labours of this very celebrated man will be given hereafter in the detached volume 

 of memoirs. 



