40 RECORD OF THE ROYAL SOCIETY 



the ivspectiw Secretaries' (being, in fact, in the first instance a 

 speculation on the part of Henry Oldenburg), though a certain 

 supen ision was exercised by the President and Council. This 

 system was continued through 4(> volumes consisting of 496 

 numbers. With the 47th volume, published in 1753 (the pub- 

 lication in numbers was thenceforward discontinued) , the publica- 

 tion \\as placed by new Statutes directly in the hands of the 

 President and Council, a Committee of Papers being established. 

 In addition to the Philosophical Transactions, the Society, 

 having powers by its Charter to appoint a printer and engraver, 

 published or sanctioned the publication of separate works on 

 natural knowledge. Among the works which received its 

 imprimatur are the following : 



Hooke, Robert, k Micrographia : or some Physiological Descriptions of 



Minute Bodies made by Magnifying Glasses. 1 Folio. London 1665. 

 (iraunt, John, ' Natural and political Observations . . . made upon the Bills 

 of Mortality, with reference to the Government, Religion, Trade, Growth, 

 Air, Diseases, and the several changes of the City [of London].* 1 (3rd 

 edition, enlarged.) 8vo. London 1665. 

 Sprat, Thomas, 'The History of the Royal-Society of London, for the 



Improving of Natural Knowledge. 1 4to. London 1667. 

 Malpighi, Marcello, 'Dissertatio epistolica de Bombyce ; Societati Regiae 



Londini dicata.' 4to. Londini 1669. 

 Holder, William, 'Elements of Speech; with an Appendix, concerning 



Persons Deaf and Dumb.' 8vo. London 1669. 



Kvrlyiu .John. * Sylva, or a Discourse of Forest Trees.' Folio. London 1670. 

 Horrocks, Jeremiah, l Opera [Astronomica] posthuma." 1 4to. Londini 1673. 

 Malpi^lii, Marcvllo, " Anatome Plantarum. 1 Folio. Londini 1675. 

 Willughby, FrancU, 4 Ornithologiae libri tres ; totum opus recognovit, 



digosit, supplevit Joannes Rains.' Folio. Londini 1676. 

 K\elyn. John, k A Philosophical Discourse of Earth, relating to the Culture 

 and Improvement of it. for Vegetation . . .' 8vo. London 1676. 



I'hiloM.phical Collections 1 [by Robert Hooke]. 1 4to. London 1679-82. 



Lectionrs Cntlerianae, or a Collection of Lectures : Physical, Mechanical, 



.raphical, and Astronomical . . / 4to. London 1679. 

 Al Tracts, by Robert Hooke. 4to. 1679-82. 



in, l)eni>. 'A V\\ Dieter, or Engine for softning Bones.' 4to. 



Ion 



' ' Ordrr.-d ami !.-!,! That Mr. Huok<> nmy jmlilish (as he hath now declared he is 

 li.-.-t or two every fortnight of such Phylosophicall matters as he shall 

 iiirct with from ...n.l'-. not making use of any thing conteind in the Register 



llook< witliout tlie leave of the ( ounrel and Author.' Council Minutes, July 3, 1679. 



