214 PHILOSOPHICAL TRANSACTIONS, [aNNO I675. 



less agreeable to the taste than the genuine single fruit. And, which is no less 

 remarkable, they have either none or very few, or empty seeds. — ^The first 

 origin of this tree, was by inoculating orange on a citron-lemon stock. 



ji4n Account of some Books. N° 114, p. 314. 



I. Archimedis Opera; Apollonii Perg. Conic. Libri 4 ; Theodosii Sphaerlca, 

 methodo nova illustrata, et succincte demonstrata, ab Is. Barrow, e Soc. Regia^ 

 &c. Lon. 1675, in 4to. 



The learned author has here delivered these three books in a brief symbolical 

 method of expression, pursuant to the sense, propositions and demonstrations of 

 the ancients; unless where he thought fit to enlarge, and otherwise to de- 

 monstrate some of the propositions from more easy principles of his own ; pur- 

 suing herein his own former method, in which some years ago, he published an 

 entire Euclid in 8vo. Besides, this edition contains a new version of Archimedes's 

 Lemmata, which were not formerly published with the rest of Archimedes's 

 works ; though to be found in Forster's Miscellanies, and at the end of Joh. 

 Alph. Borelli's edition of the three latter books of Apollonius's conies. It will 

 readily be acknowledged, that our author had cause to find fault, as he does, 

 with the obscurity of Rivalt's edition ; who is also much complained of by 

 Mydorgius in his Conies, and by Alex. Anderson, in his Mathematical Exercises. 



II. Thomas Bartholini Acta Medica et Philosophica Hafniensia Anni 16/3. 

 Haf. 1675, in 4to. 



A continuation of a useful medical and philosophical work, of which a former 

 volume was noticed in N° 97 of these Transactions. 



III. The Epitome of the whole Art of Husbandry, with Additions of New 

 Experiments thereto belonging: written by J. B. Gent, in 8vo. Lond. 1675. 



A Proposal to Noblemen, Gentlemen and others, who are willing to subscribe to- 

 wards Dr. Morison^s New Universal Herbal, ordering Plants according to a 

 new and true Method, never published before. N° 114, p. 327. 



[For critical remarks on this work, see life of Morison, p. 342, volume I, of 

 this Abridgement.] 



A New Essay Instrument. By Mr. Boyle. N° 115, p. 329. 



For many years I had made use of a little glass instrument, consisting of a 

 bubble, and furnished with a long and slender stem, to compare the specific 

 gravities of different liquors, by its sinking in them more or less. Afterwards I 

 applied it to discover the specific gravities of several appended solids, by its 

 being more or less depressed by them in the same liquor. For it is plain from 

 liydrostatic principles, that any solid body, heavier than water, loses in the 



