586 HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 



11782 MERSENNE (Marin ; Ord. Min.) COGITATA PHYSICO-MATHEMATICA, in quibus tarn 

 Naturae quam Artis Effectus admirandi certissimis Demonstrationibus explicantur ; with 

 n umcrous woodcuts, 3 vols. 4to. old calf, rebacked (some II. of v. I wormed, otherwise a sound and 

 clean copy] ; rare, 5. 15s Parisiis, A. Bertier, 1644-7 



' An exceedingly interesting collection, which is of very rare occurrence, and seldom to be found complete. Father 

 Mersenne was in constant correspondence with all the most celebrated men of his time, e. g., Galileo, Tonicelli, Pascal, 

 Descartes, Fermat, Rnberval, and others, and in this collection has published, besides his own writings, most important 

 works and letters of his friends not to be found elsewhere, and including not only their discoveries but also their 

 scientific quarrels '. Libri Catalogue. 



The work consists of the following independent treatises, with separate titles : De Mensuris, Ponderibus et Nummis ; 

 Hydrauliea Pneumatica ; Ars Navigandi ; Harmonia Thecrioa, Practica fMusica], et Mechanica Phenomena; 

 Ballistica et Acontismologia ; Universe Geometric, Mixtseque Mathematics Synopsis, et bini Refractionum Demon- 

 stratarum Tractatus ; Nova? Observationes Physico-Mathematiae, quibus accessit ARISTARCHUS SAMNIUS de Mundi 

 Systemate. 



Of special importance is his suggestion (Phenomena Hydraulico-Pneumatica, p. 96) of a reflecting telescope, by 

 recommending the use of two concave mirrors opposed to each other. 



' The preface to the Cogitata contains a statement (possibly due to Fermat), that, in order that 2P - 1 may be prime, the 

 only values of p, not greater than 257, which are possible are 1, 2. 3, 5, 7, 13, 17, 19, 31, 67, 127, and 2">7 ; the number 67 

 is probably a misprint for 61. With this correction the statement appears to be true, ai.d has been verified for all 

 ^xpppt 21 values of j). ... The theory of perfect numbeis depends diiectly on that of Mersenne's numbers'. 

 W. W. R. Ball. 



11783 MESSENGER (The) of MATHEMATICS, edited by W. ALLEN WHITWORTH, pr., 

 CHARLES TAYIOR, D.D., R. PENDLEBURY, and J. W. L. GLAISHER, F.R.S., from May, 1877 

 to April, Ib99 ([NEW SERIES] Vols. VII XXVIII), with plates, 22 vote. 8vo.,-y. 3-12 

 in 3 v. hf. calf, v. 13-26 in buckram, and the rest sewn (wanting No. 2 of v. XXVIII} ; 

 SCARCE, 8. Ss 187H-99 



11784 VOL. I, with 3 plates (% folding), and diagrams, Svo. hf. cl., uncut (SCARCE), 



105 Qd 1872 



Containing contributions by Arthur Cayley, Sir James Cockle, N. M. Ferrers, D.D., John Hopkinson, E. J. Routh, 

 Sir G. G. Stokes, FF.R.S., and the Editors. 



METEOROLOGICAL MAGAZINE (Monthly )- v. SYMONS, post. 

 11 785 OBSERVATIONS recorded at SEVEN STATIONS in INDIA in 1888, corrected and reduced, 



published under the Direction of HENRY F. BLANFOBD, F.R.S., folio, sewn, 3s Qcl Calcutta, 1889 

 11786 THE SAME for 1891, published under the Direction of JOHN ELIOT, F.R.S., folio, boards, 



4s 6d ibidem, 1892 



11787 'at STATIONS of the SECOND ORDER for 1878 and 1879, published by Direction of 



the Meteorological Council, 2 vols. roy. 4to. hf. calf neat, 10s Qd (p. 2. unbound) 1880-2 



11788 for the Year 1901, with map, roy. 4to. sewn, 8s6d (p. 1. 2s GoJnett) Edin., 1906 

 11789 , RESULTS of, in CEYLON, during 1892, folio, hf. calf, 3s Colombo, 1892-3 



11790 - and RESULTS, 1893-1902 [made at the U.S. NAVAL OBSERVATORY, WASHING- 

 TON, by D. HORIGAN, N. CAHILL, and W. HENDERSON], roy. 4to. cl., 6s Qd Washington, 1903 



11791 RECORD (The): MONTHLY RESULTS of OBSERVATIONS made at the Stations of the 



Meteorological Society, with Remarks on the Weather, by WILLIAM MARRIOTT, from Dec. 1882 

 to June 1909 (Nos. 8-114), with charts and diagrams, 100 parts roy. 8vo. sewn (wanting nos. 74, 99, 

 101-2, 107, 109 and 111), 17s 6d (p. 7. 10s) 1882-1909 



AN UNUSUALLY COMPLETE SET : 



11792 SOCIETY (Royal), PUBLICATIONS of the (as under), COMPLETE from the 



beginning in 1861 to Jan., 1913, with the Meteorological Record, and INDEX to Q. J., 

 1882-1900, copiously illustrated with plates (including portraits), woodcuts, maps and 

 charts, 85 vols. and several parts roy. 8vo. (5 v. 8vo.), everything to 1901 in 24 vv. hf> 

 calf, and the rest in parts as ifsued, 14 14s (p. 50. unbound) 1861-1913 



CONTENTS : PROCEEDINGS of the BRITISH METEOROLOGICAL SOCIETY, 5 vols. Svo. hf. calf gilt, '61-71 : QUARTERLY 

 JOURNAL of the [later ROYAL] METEOROLOGICAL SOCIETY, Vols. I XXXIX No. 1, roy. Svo., w. 1-27 in 19 vols. hf. calf, 

 ivl the rest in parts, '71-1913 : The METEOROLOGICAL RECORD, COMPLETE in 31 vols. roy. Svo., vv. 1-21 bound up with the 

 Quarterly Journal and the rest in parts, '81-1911: INDEX to Q. J., 18S2-1900, sewn: INDEX to the PUBLICATIONS of the 

 ENGLISH METEOROLOGICAL SOCIETIES, 1839-81, 'SI : LIBRARY CATALOGUE, Svo. cl, '91 : Extra Publications: METEORO- 

 LOGY of ENGLAND, by JAMES GLAISHER, F.R.S., "08-85 and '96-1901, bound up with Q. J. : The SNOW STORMS of Jan. 17th to 

 21 st. 1881 : HINTS to METEOROLOGICAL OBSERVERS, by W. MARRIOTT, '81, '87, '92 : The HISTORY of ENGLISH METEORO- 

 LOGICAL SOCIETIES, 1823-80, by G. J. SYMONS, F.R.S. : INSTRUCTIONS for the OBSERVATION of PHENOLOGICAL PHENOMENA, 

 Und Ed., '83 : LISTS of FELLOWS, etc. etc. 



11793 ANOTHER SET, COMPLETE from 1867 to 1904, copiously illustrated with 



plates (including portraits), woodcuts, and charts, 33 vols. roy. Svo. and 8vo. in parts, 

 seven as issued, 7. 7s 1867-1904 



CONTENTS : PROCEEDINGS of the BRITISH METEOROLOGICAL SOCIETY, Vols. IV V, Svo. '67-71 : QUARTERLY JOURNAL of 

 the [later ROYAL] METEOROLOGICAL SOCIETY, ed. by JAMES GLAISHER, F.R.S., 30 v. roy. Svo., '71-1904. R.M.S.'s LIBRARY 

 CATALOGUE, '!!. 



11794 , QUARTERLY JOURNAL of the, edited bv a Committee of the Council, complete 



from 1877 to 1909 (Vols. III-XXXV), illustrated in all 33 vols. roy. 8vo., vv. III-XIII in 8 vols. 

 hf. calf, and the rest in parts as issued, 6. 6s (p. 33. unbound) 1877-1909 



11795 _ ANOTHER SET, from L81 to 1899 and from 1906 to 1908 (Vols. VII-XXV and XXXII- 



XXXIV), with INDEX to v. VII-XXVI 23 vols. roy. 8vo., the first 6 vols. in 2, hf. calf (damaged) 

 and cl. , and the rest in parts as issued, 1. 15s (p. 21. 7*) 1881-1908 



11796 _ -A SERIES from 1877 to 1899 (Vols. III-XXV), illustrated, 23 vols. roy. 8vo., the first 

 10 v. cl., and rest in parts as issued (wanting 6 parts), 2. 2s 1877-99 



