132 PHILOSOPHICAL TKANSACTIONS. [anNO]674. 



the mean time let every one enjoy his own opinion, and proceed in his own 

 way.* 



On Kepler s Manuscripts. 



As to the manuscripts of the celebrated Kepler, which you enquire after, I 

 purchased them all from his representatives for a certain sum, as well those 

 that have been published, as those that have never yet been published ; among 

 which are a great many letters that passed between him and other celebrated 

 persons. Among these MSS. are found several well deserving to be published, 

 not only many letters, but some works also, -among which is his Hipparchus, 

 which, though not quite digested, might be easily put in sufficient order for 

 that purpose. I have also his MS. chronology. But I do not find a written 

 account of his life ; though there are numerous facts and traits, from which a 

 clear account of it might be given. But what I possess of his is contained in 

 the following catalogue. 



Then follows the catalogue, which is curious, but not of any use now, and 

 too long to be copied here ; especially as the whole of those papers were de- 

 stroyed at the time of the dreadful fire, which consumed the books and observa- 

 tory of Hevelius, in the year 1679. 



u4n Account of some Books. N° 102, p. 31. - 



I. Johannis Schefferi Lapponia, &c. Franc. 1673, in 4to. 



Describing the situation of the country, the climate and inhabitants, their 

 persons, manners, customs, &c. 



II. The True English Interest, or an Account of the Chief National Im- 

 provements ; in some Political Observations, demonstrating an Infallible Ad- 

 vance of this Nation to infinite Wealth and Greatness, Trade and Populacy, 

 with Employment and Preferment to all Persons. By Carew Reynel, Esq. 

 in 8vo, 1674. N 



III. England's Improvement Revived, in Husbandry and Trade, by Land 

 and Sea, &c. By John Smith Gent, in 4 to. 



* In the future numbers of these Transactions, we shall have occasion to notice several other 

 papers on this subject, of the difference between plain and telescopic sights, by Hevelius, Hook and 

 several other astronomers : of which also a connected account, pretty much at large, may be seen 

 in the life of Hevelius, in Dr. Hutton's dictionary, vol. I. page 556, 



