372 PHILOSOPHICAL TRANSACTIONS. [aNNO 170/. 



A Letter from Mr. ffVliam Baxter to Dr. Hans Shane, R. S. Seer, containing 

 an Account of a Book intitled, /irc/ueologia Britannica, giving some Account, 

 additional to what has hitherto been published, of the Languages, Histories, and 

 Customs of the original Inhabitants of Great Britain : from Collections and 

 Observations in Travels through fVales, Cornwall, Bas Bretagne, Ireland 

 and Scotland. By Edward Lhuydy M. A. of Jesus College, Keeper of the 

 Ashmolean Museum in Oxford. Fol. J. Containing, 1. A Comparative Ety- 

 mology ; or. Remarks on the Alteration of Languages. 2. A Latin Celtick 

 Dictionary : or, a Vocabulary of the original Languages of Britain and 

 Ireland. 3. An Armoric Grammar. 4. An Armoric English Vocabulary^ 

 6. Some IVelsh fVords omitted in Dr. Davies's Dictionary. 6. A Cornish 

 T, Grammar. 7« A Catalogue of British Manuscripts. 8. An Essay towards 

 a British Etymologicon. Q. A brief Introduction to the Irish or ancient 

 Scottish Language. 10. An Irish-English Dictionary. Oxford, printed at 

 the Theatre for the Author, 1707. And delivered at the Ashmolean Museum. 

 N** 311, p. 2438. 



Microscopical Observations on the Peruvian Bark. By Mr. Anthony Fan Leu- 

 wenhoeck, F. R. S. N° 312, p. 2446. 



In all woods known to me, the bark proceeds out of the wood, and every 

 year there is produced a new bark between the wood and the old one of the 

 former year ; by which means the barks of trees grow every year thicker and 

 thicker ; so that at length the extreme bark, that lies farthest from the tree, 

 not only receives no nourishment, but even dies. 



By examining, I perceive that the bark called china chinae, or peruvian bark, 

 consists mostly of long particles, both ends of which run into a point, some of 

 which, at first view, one would judge to be twice or thrice as long as the rest ; 

 but examining them more nicely, I found that they were several particles 

 sheathed, as it were, within one another, in such a manner, that without look 

 ing very closely, one would take them to be one continued particle. These 

 particles are somewhat transparent, inclining to a yellowish colour, and almost 

 round. 



Fig. 15, pi. 10, represents a long particle, which lay the length of the wood 

 in an oblique position, from among some of those that were near the extremity 

 or superficies of the bark. Fig. 16 represents an exceedingly small part of the 

 abovementioned particles, as they are cut across, by which they appear in an 

 oval figure ; and if we view them very nicely we may discover, that they are 



