WORKS IN THE PRESS. 



I. Popular treatises on science of the middle-ages: — 1. The Anglo- 

 Saxon manual of astronomy. 2. The Bestiary and Tractatus de Creaturis 

 of Philip de Thaun, in Anglo-Norman verse. 3. The Ymage du 

 Monde, by Gautier de Metz, in French verse. 4. A cosmography in 

 English verse of the 14th century. Edited with translations by Thomas 

 Wright, Esq., M.A., F.S.A. 



II. A collection of letters written by Harriot, Brereton, Cavendish, 

 Pell, Morland, and other eminent English mathematicians of the seven- 

 teenth century, before the publication of Newton's Principia. Edited 

 by James Orchard Halliwell, Esq., F.R.S., F.S.A., F.R.A.S., &c. 



WORKS SUGGESTED FOR PUBLICATION. 



III. Treatises on Geometry written in England during the 13th and 

 14th centuries ; including an hitherto inedited treatise on that subject, 

 by Roger Bacon. 



IV. Treatises on the theory and practice of music, of the fifteenth 

 century. From a MS. in the Lansdowne collection in the British 

 Museum. 



V. An English treatise on Algorism, or Arithmetic, of the fourteenth 

 century. From a MS. in the Ashmolean Museum at Oxford. 



VI. The preface to the Seventh Book of the Mathematical Collec- 

 tions of Pappus Alexandrinus, in the original language; with an 

 English translation, and explanatory notes. 



VII. An English tract on the making of oils and medicinal waters, 

 from a MS. of the fourteenth century. 



VIII. Proposals for mechanical inventions addressed to Queen 

 Elizabeth by William Bourne, " Master of the Gravesend Barge." 

 From a MS. in the British Museum. 



IX. A catalogue of the scientific manuscripts formerly in the library 

 of Dr. John Dee of Mortlake. From Dee's own catalogue in the 

 British Museum. 



