220 . PHILOSOPHICAL TRANSACTIONS. [aNNO 1675. 



Advertisements occasioned hy the Remarks printed in N° 1 14, upon Frosts in some 

 parts of Scotland, differing in their Anniversary Seasons and Force from our 

 ordinary Frosts in England : of Black Winds and Tempests : of the warm or 

 fertilizing Temperature and Steams of the Surface of the Earth, Stones, Rocks, 

 Springs, Waters, (some in some Places, more than other in other Places; J of 

 Petrifying and Metallizing Waters : luith some Hints for the Horticulture of 

 Scotland : hy the Reverend and Learned Dr. J. Beal, F. R. S. ; who by Way of 

 Letter imparted them, to the Editor, N° 11 6, p. 357. 



There is no part of these long and uninteresting remarks, that can be of 

 any use to reprint in this collection. 



Extract of Mr. Flamsteed's Letter of July 24, l6y5, to the Editor, relating to 

 another, printed in N° 110 of these Tracts, concerning M. Horroxs Lunar 

 System. N° ll6, p. 368. 



The commonly received lunar systems, though as little agreeable with nature 

 as with the heavens, were entertained from one astronomer to another with 

 little alterations, from the noble Tycho to the author of the Caroline tables: 

 but when I had found, by many curious and careful measures of the moon*s 

 diameters, that the heavens would never admit those hypotheses, which made 

 the diameter of the perigaeon moon in the quadratures larger than the full mooii 

 on the perigee; and that only the system of Mr. Horrox, which I had found in 

 Mr. Crabtree's letters, would represent it as observed broadest at full ; and 

 afterwards that it would accord well with some observations to which the com- 

 mon tables agreed not within -f of a degree : I thought it might be worth my 

 labour to adorn it with numbers, that it might be fit for trial as soon as it ap- 

 peared in public; to which I added an explanation, to be found in the edition 

 of his posthumous works. This system has been well approved of by several 

 good astronomers, and Mr. Street has esteemed it so good, that he has printed 

 a figure of it with the description of his planetary instrument; but without 

 acknowledging the proper author, or so much as naming him more than once, 

 and then in such terms as may persuade any person not well acquainted with 

 Mr. Horrox's works, that he was but some inconsiderable astronomer, and Mr. 

 Street's print a quite different system. " All, says he, being somewhat different 

 from the limitations of the theory of Horrox, and tables therewith published.'* 

 This obliged me, when I found it only different in the position of the libratory 

 circle, to take notice of it in a letter to Mr. Collins, from whom you received 

 the information, and with my consent printed the extract of it : in which I de- 



