HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 453 



MEMORIALS OF THE DISCOVERER OF FINDING THE LONGITUDE AT SEA, INCLUDING MANY 



ORIGINAL MANUSCRIPTS: 



8955 HARRISON (John ; ' Longitude Harrison ') An EXPLANATION of my WATCH or TIME- 

 KEEPER for the LONGITUDE ; and as with a View of other Time-keepers, viz. of such as have [been] 

 hitherto produced in the World and as farther, with some Historical Account coincident with my 

 Proceedings, a certified copy of the original Manuscript, with a tracing of the first page 

 of the original MS. ; neatly written on 158 pp. of writing paper, 4to. hf. roan, with bookplate of 

 Bennet Woodcroft, F.R.S., 1. Is 1869 



8956 NARRATIVE of the PROCEEDINGS relative to the DISCOVERY of the LONGITUDE at SEA, 



by MR. JOHN HARRISON'S TIME-KEEPER, subsequent to those published in 1763, sm. 8vo. (pp. 18), 

 sewn, 7s Qd printed for the author, 1765 



8957 Of the NATURE of a PENDULUM, as primarily implying in itself ; and secondarily, as 



when, according to any particular Manner (good or bad) in which it may be apply'd to the 

 Draught of the Wheels of a Clock, etc., a Manuscript, wholly in Harrison's handwriting-, 

 neatly written on 143 pp. of writing-paper, sm. 4to. old vellum, 4. 4s Saec. XV III. 



The second part of the manuscript (pp. 77-143) treats of the author's scale of music, and the whole appears to be the 

 original MS. of ' A Description concerning such Mechanism as will afford a nice and true Mensuration of Time, together 

 with some Accounts of the Attempts for the Discovery of the Longitude by the Moon ; as also an Account of the 

 Discovery of the Scale of Music,' published in 1775. 



8958 The PRINCIPLES of MR. HARRISON'S TIME-KEEPER, with Plates of the same, published 



by Order of the Commissioners of Longitude, with 10 folding plates on copper, 4to. sewn (RARE), 

 1. Is 1767 



8959 ANOTHER COPY, contemporary hf. calf, ]. 3s Qd 



The fullest account published descriptive of Harrison's famous 4th chronometer (preserved with the three preceding 

 time-pieces at Greenwich Observatory), for which he received the parliamentary grant of 20,000. 



The preface and ' Notes taken at the Discovery of Mr. Harrison's Time-Keeper' were written by NEVIL MASKELYNE, 

 pr., F.R.S. 



8960 : MR. SANDERSON'S MECHANICKS : a Transcript of the Manuscript Lectures on 



Mechanics by Nicholas Saunderson, F.R.S. , wholly and very neatly written on 304 

 pages, with numerous diagrams, by John Harrison when a young man, with some 

 MS. additions by him written at an advanced age, sm. 4to. old calf ', 10. 105 [c. 1710] 



An exceedingly interesting manuscript, which may be said to have been the basis of Harrison's mechanical knowledge. 

 Dr. Samuel Smiles, in his biographical sketch on Harrison, refers to the above MS. in the following words : ' In the 

 meantime Harrison eagerly improved every incident from which he might derive further information. There was a 

 clergyman who came every Sunday to the village [Barrow, near Barton-on-Humber] to officiate in the neighbourhood ; 

 and having heard of the sedulous application of the young carpenter, he lent a manuscript copy of Professor Saundersou's 

 discoveries [recte lectures]. The blind professor had prepared several lectures on natural philosophy for the use of his 

 students, but they were never intended for publication. Young Harrison now proceeded to copy them out, together with 

 the diagrams. Sometimes, indeed, he spent the greater part of the night in writing or drawing. 1 



THE ABOVE IS THE ACTUAL MS. COPY PREPARED BY HARRISON HIMSELF. 



8961 A TRUE and FULL ACCOUNT of the FOUNDATION of MUSICK, or, as principally therein, 



of the EXISTENCE of the NATURAL NOTES of MELODY, AN UNPUBLISHED MANUSCRIPT, 

 neatly written on 182 pp., and wholly in the handwriting of John Harrison, 4to. old 

 vellum, 5. 5s \c. 1770] 



Harrison besides being an expert mechanician was also a noted musician, the only work published by him on the 

 subject being however an ' Account of the Discovery of the Scale of Music', added as an Appendix to his 'Description 

 concerning such Mechanism as will afford a nice and true Mensuration of Time ', published in 1775, thus giving all the 

 more interest to the above MS. 



' He had a musical ear, and made experiments on sound with a curious monochord of his own invention, from which 

 he constructed a new musical scale or mechanical division of the octave, according to the proportion which the radius 

 and diameter of the circle have respectively to the circumference.' D, N. B. 



8962 : MINUTES of the BOARD of LONGITUDE, a COMPLETE SET of those which REFER to 



JOHN HARRISON, Transcripts in a contemporary hand, 45 Nos. folio, 2. 2s 1737-73 



8963 , PORTRAIT of, engraved on steel by W. HOLL, after a painting by King, roy. 8vo. 



(SCARCE), 5s n. d. 



8964 , MANUSCRIPT MATTER containing BIOGRAPHICAL INFORMATION concerning, written on 



about 200 II. and including original information, in portfolio, 1. Is Scec. XIX. 



The above Harrison manuscripts would be of great value to anyone intending to write a much-needed biography of the 

 inventor of the gridiron pendulum and the compensation curb in chronometers, AND THE FIRST MAN TO FIND A SURE 

 MEANS OF FINDING THE LONGITUDE AT SEA. The scanty biographies of him hitherto published are wholly inadequate and 

 incomplete, and few people have heard of the self-taught Englishman to whom the whole world has been indebted ever 

 since. 



8965 : [HARRISON (John ; grandson of ' Longitude Harrison ')] MEMOIRS of a TRAIT in the 



CHARACTER of GEORGE III., authenticated by Official Papers and Private Letters in Possession 

 of the Author : with Appendix of Illustrative Tracts, etc., abridged from the Original Work in 

 Manuscript, by JOHAN HORRINS [anagram], Gent., 8vo. hf.cl., uncut (scarce), 15s 1835 



Dealing exclusively with the last payment of 10,000 to John Harrison, tardily and unwillingly paid by the Board of 

 Longitude on the intervention of King George III. himself. The work is especially directed against Dr. Maskelyne, the 

 Astronomer Royal, who is supposed to have shown special hostility to Harrison in order to advance his own imperfect 

 method of finding the longitude by lunar distances only. 



8966 THE ORIGINAL MANUSCRIPT, neatly written on 1376 pages, 16 parts 4to. 



sewn, 5. 5s Scec. XIX. 



A very interesting manuscript, very rich in information regarding John Harrison's life and work. Only a very small 

 portion of it has been printed in the above published work. 



8967 : SMILES (Samuel, LL.D.) JOHN HARRISON, the CHRONOMETER-MAKER, 8vo. (pp. 16), hf. 



crimson morocco (scarce), 5s [1882] 



8968 ANOTHER COPY, sewn, 3s Qd 



