VQL. XXIV.] PHILOSOPHICAL TRANSACTIONS. lb? 



exert the very same force upon the pads or pallets; which is very rarely met 

 with ; for most clocks are apt to vibrate sometimes larger, sometimes smaller 

 arches in the 24 hours, according as the weight or spring more or less exerts 

 its force on the work. 



j4n Account of a Book. Apicii Ccelii de Opsoniis el Condtmentis sive Arte 

 Coquinaria Libri x. Cum Annotationibus Martini Lister, et variis Lectioni- 

 bus integris Humelbergiij Barthii, et variorum. Land. 1705, Sfo. N° 294, 

 p. 1782. 



The learned world has been already obliged to the editor for his notes upon 

 Sanctorius, and Hippocrates's Aphorisms; and in this edition of Apicius he 

 gives further proofs of his generosity in serving the republick of letters. 



His preface may be justly called a critical introduction to the history of 

 Apicius, as to his country, his age, his design, and the various editions of his 

 work, at Venice, Basil, Lyons, and Zuric; among which many doubts are 

 cleared up. And the annotations of Dr. Lister will appear as valuable as those 

 of the most professed critics ; he being intent upon things, and they too fre- 

 quently upon words. 



After the Prolegomena come the 10 books of Apicius under their distinct 

 titles, with the scholia and notes of G. Humelbergius, C. Barthius, Dr. Lister, 

 and others; among which are interspersed several remarks of J. Casaubon, Sal- 

 masius, Nonnius, &c. all distinguished in the several columns of this beautiful 

 edition. Among these, the reader will meet with many passages of the ancients 

 illustrated, and set in a true light; especially Horace, Celsus, Scribonius Largus, 

 Dioscorides, Pliny, Athenaeus, Ccelius Aurelianus, Martial, Petronius, the 

 Rei Rusticae Scriptores, the Geoponici, and many others. At the end there is 

 a very particular and complete index. 



It was thought proper to print only 120 copies of this piece, to satisfy the 

 curious, at the expence of some noble and liberal subscribers, whose names are 

 affixed on the back of the title page; after the manner of publishing Mr. Lhwyd's 

 Lithologia Britannica, in the year 1699. 



Concerning Animalcula on the Roots of Duck-weed. By M. Leuwenhoeck, F.R.S, 



N°295, p. 1784. 

 In the month of July last, I caused several of these weeds, as they were car- 

 ried by the stream through Delft, to be taken out of the water in an earthen 

 pot; and taking several times a full view of the animalcula that were fastened 

 to the small roots of that green stuff, they appeared as in fig. 27, pi. 6 j where 



