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



11782 MERSENNE (Marin; Ord. Mm.) Cogitata Physico-Mathematica, in quibus tarn 

 Natiiiie quam Artis EfFectus admirandi certissimis Demonstrationibus explicantur ; ivith 

 n iimerous woodcuts, 3 vols. 4t(>. old calf, rebacked {some II. of v. I ivormed, otherwise a sound and 

 clean copy) ; rare, £5. 15* Parisiis, A. Bertier, 1644-7 



'An exceedingly interesting collection, which is of Aery 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, Torricelli, Pascal, 

 Descartes, Ferraat, 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 '. — hilyti, CatoJogne. 



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

 Hydraulica Pneumatica ; Ars Navigandi ; Haimonia Thecrica, Practica [Musica], et Mechanica Phsenomena; 

 Ballistica et Acontismologia ; Universe Geometrise, Mixtseque Mathematicse Synopsis, et bini Refractionum Demon- 

 stratarum Tractatus ; Novae Observationes Physico-Mathematicic, quibus accessit Aristarchus Samnics de Mundi 

 Systemate. 



Of special importance is his suggestion (Phtenomena Hydraulico-Pneumatica, p. 96) of a reflecting telescoi)e, 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, 1!», 31, 67, 127, and 2o7 ; the number 67 

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

 except 21 values of p. . . . The theory of peifect numbers depends diiectly on that of Mersenne's numbers'.— 

 W. W. E. Ball. 



11783 MESSENGER (The) of MATHEMATICS, edited by W. Allen Whitworth, pr., 

 Charles Tayior, d.d., K Pendlebury, and J. W. L. Glaisher, f.r.s., from May, 1877 

 to April, 1899 ([New Series] Vols. VII— XXVIII), with plates, 22 vols. Svo.,v. 3-12 

 in 3 V. hf. calf, v. 13-26 in buckram, and the rest sewn {wanting No. 2 of i\ XXVIII) ; 

 scarce, £8. 85 1878-99 



11784 Vol. I, with S 2}lcites {2 folding) and diagrams, 8vo. hf. cl., uncut (scabce), 



10* 6d 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 (HLonthly)- v. 8ymo^s, post. 



117S5 OBSERVATIONS recorded at Seven Stations in India in 1888, corrected and reduced, 



published under the Direction of Henry F. Blanfobd, f.r.s., folio, sevm, 3s 6d Calcutta, 1889 



11786 The Same for 1891, published under the Direction of John Eliot, f.r.s., folio, boards, 



45 6c? ibidem, 1SQ2 



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 6d (p. £2. unbound) 1880-2 



11788 for the Year 1901, toith map, roy. 4to. sewn, 8s 6d (p. £1 . 2s 6d nett) 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 6c? Washington, 1903 



11791 RECORD (The): Monthly Kesults 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. Svo. sewn (wanting nos. 74, 99, 

 101-2, 107, 109 and 111), 17s dd (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., 1918, 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.j, everything to 1901 in 24 vv. hf. 

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



Contents :— Proceedings of the British Meteorological Society, r, vols. Svo. hf. calf gilt, '61-71 : Quarterly 

 Journal of the (later Royal] Meteorological Society, Vols. I— XXXIX No. 1, roy. Svo,, vv. 1-27 in 19 vols. hf. calf, 

 end the rest in parts, '71-1913 : The Meteorological Record, complete in 31 vols. roy. Svo., vv. 1-21 honnd vp with live 

 Quarterly Journal and the rest in parts, '81-1911 : Index to Q. J., 1882-1900, 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 

 21j,t, 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, 

 2nd Ed., '83 : Lists of Fellows, etc. etc. 



11793 _. ANOTHER JSET, complete from 1867 to 1904, copiously illustrated with 



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

 sewn as issued, £7. 7s ' 1867-1904 



Contents :— Proceedings of the British Meteorolo«jical 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. 8vo., '71-1904, R.M.S.'s Library 

 Catalogue, '91. 



11794 , Quarterly Journal of the, edited by a Committee of the Council, complete 



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

 hf. calf, and the rest in parts as issued, £6. 65 (p. £83. unbound) 1877-1909 



1179.5 Another Set, from 1S81 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., ayid the rest in parts as issued, £1. \os (p. £21. Is) 1881-1908 



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



\Qv.cl., and rest in parts as issued {imnting 6 parts), £2. 2s " 1877-99 



