HENRY SOTHERAN & CO., 140, STRAND, W.C., and 43, PICCADILLY, W. 609 



12239 MXJDGE (John; M.D., f.r.s., brother of Thomas Mi/dge ; friend of Dr. Johnson) Directions 

 for makint; the best Composition for the Metals of Reflecting Telescopes, with Description 

 of the Process for Grinding, Polishing, and giving the great Speculum the true Paracolic 

 Curve, vith folding copperplate by Basire, 4to. (pp. 50), sewn (RARE), 15* 1777 



'Mud^^e was awarded' the Copley medal'of the Royal Society for his lUrections. . . . Sir John Pringle, the president, 

 ■n making the jjresentation, remarked : 'Mr. Mudge hath truly realised the expectation of Sir Isaac Newton, who, about 

 one hundred years ago, presaged that the public would one day possess a parabolic speculum, not accomplished by 

 mathematical rules, but by mechanical devices '.'—/). A . li. 



12240 MXJDGE (Thomas), Description of the Time-Keeper invented by, with a Narrative by 

 Thomas Mudge, his Son, of Measures taken to give Effect to the Invention since the Reward 

 j)estowed upon it by the House of Commons. 1793; a Republication of a Tract on the Improve- 

 ment of Time-Keepers, and Letters written by him to Count Bruhl [sic], 1773-87, 2vith fine 

 portrait by SCHIAVONETTI, after Dance, and ^folding plates^ 4to. boards, 2mc2tt (portrait foxed 

 and its lower margin water-stained) ; VERY RARE, £2. 2* 1799 



A full account of the author's chronometer— an improvement on Harrison's— for which he received a parliamentary grant 

 uf£2.'>00. Mudge was the inventor of the lever escapement, and made Dr. Johnson his first watch in 17GS. One of his 

 "watches is still preserved in going order in the Soane Museum. 



12241 : Register of the Going of Mr. Mudge's First Time-keeper, from April 18th, 1780, 



to May 7th, 1781 : with 2 other Registers of the said Time-Piece, 4to. (pp. 16), sewn, 6* Qd [1781] 



Including the favourable report by Dr. Hornsby, Savilian prof, astronomy, Oxon., 177(;, and the unfavourable one by 

 Dr. Nevil Maskelyjie, the Astronomer Royal, which caused a long controversy. 



12242 : Mudge Jr. (Thomas, of Lincoln's Inn) A Narrative of Facts, relating to some Time- 

 Keepers, constructed by Mr. Thomas Mudge, for the Discovery of the liongitude at Sea : with 

 Observations on the Conduct of the Astronomer Royal respecting them, 8vo. (pp. 104), sewn, 

 85 M 1792 



dr. nevil maskelyne's copy : 



1-2243 : A REPLY to the Answer of the Rev. Dr. Maskelyne, Astronomer Royal, te 



a Nanative of Facts, relating to some Time-Keepers, constructed by Mr. Thomas Mudge, for the 

 Discovery of the Longitude at Sea, etc., with a Short Explanation of the most proper Methods of 

 Culculating a Mean Daily Rate, with Kemarks on some Passages in Dr. Maskelyne's Answer, by 

 the Count de Bruhl [««>], 8vo. boards {back torn), uncut, £1. \s 1792 



This copy belonged to Dr. Nevil Maskei.yne, the Antronomer Royal, and contains in his liandwriting 'From the 

 author of the Appendix ' on Hyleaf, as well as corrections and numerous long pencil notes on margin, in which he replies 

 to the objections advanced against him. 



* These [Mudge's green and blue chronometers] were submitted to the same rigorous tests as the first, but like it, they 

 were described by the astronomer royal as not having satisfied the requirements of the act. A controversy ensued, in 

 which it was stated that ^Maskelyne had not given tlie timekeepers fair trial, but that they had gone better in other hands 

 both before and after the period during which they had been under observation. Mudge's case was strongly urged in a 

 pamphlet issued by his eldest son, entitled 'A Narrative of Facts ', 17'.i2. Maskelyne retorted in 'An Answer to a 

 Narrative of Facts ' (r. ,Vo. 11542 ante), and the controversy closed with the younger Mudge's ' Reply to the Answer ' 

 (1792). ... It is curious that Harrison entertained similar grievances against Maskelyne (v. l^os. 8965-0 and 8970, ante), and 

 it was currently supposed that the astronomer royal had a scheme of his own for finding the longitude by lunar tables 

 which disposed him to apply ultra-rigorous teats to the chronometers.'— D.JN'.B. 



12244 MTJDGE (Major-Gen. William, f.r.s., son of John Mudge) Account of the Measurement 

 of an Arc of the Meridian, extending from Dunnose in the Isle of Wight to Clifton, Yorks., 

 in the Course of the Operations carried on for the Trigonometrical Survey of England, 1800-2, 

 with 1 fine copperplates {b folding) of geodetic instruments, and folding map, large 4to. hf. calf 

 {binding slightly damaged), ^s 1804 



12245 Another Copy; also: Mudge (Major-Gen. William, F.R.S.), Isaac Dalby, and 



Major-Gen. Thomas Frederick Colby, f.r.s. : Account of the Operations for accomplishing 

 a Trigonometrical Survey of England and Wales, from its beginning in 1784 to 1809, with 

 43 folding plates and maps on copper, 4 vols. 4to. in 3, contemporary russiagilt {a few joints weaky 

 but a nice copy), lis 6d 1799-1801-11 



A continuation of General Roy's survey, which only included Kent, and the first ordnance survey of England and 

 Wales. It also includes the measurement of an arc of the meridian between Dunnose Point, Isle of Wight, and a statioa 

 near the mouth of the Tees. Its protagonist was the ' Lieutenant Colonel Mudge, The Tower ', whose old-world legend 

 we have so often noticed at the base of the finely-engraved first issue of the Ordnance Maps. 



1-2246 MULDER (E., Univ. Utrecht) De Methode bij Scheikundig Onderzoek te volgen, opge- 

 spoord nit de Geschiedenis, roy. 8vo. sewn. Is 6d Utrecht, 1868 



12247 MULDER (Gerard Jan) Chemische Untersuchungen [iiber die Galle, Protein, Behenol 

 und amorphes Ciiinin, Proteiuverbindungen u. A. m.], unter des Verfassers Mitwirkung 

 iibersetzt von A. Volcker, 3 parts 8vo. seum {scarce). Is ijd Frankfurt a. M., 1847-8 



Containing the author's important investigations on proteids, which involved him in an acrimonious controversy witli 

 Liebig. He refers to the latter in the preface : ' . . . so sehr wiinsche ich, dass dieso Untersuchungen nicht in die 

 Hande des Mannes gelangen mochten, der statt Wahrheitssinn grobe Selbstsucht, statt Wissenschaft Gewinnsucht niihrt, 

 dessen Bestreben Vernichtung und Rache erfiillt. . . . Wo ich darauf hingeleitet Merde, werde ich auf diesen Schandfleck 

 der Wissenschaft dieses Zeitalters jederzeit zuriickkommen '. 



1224K SCHEIKUNDIGE Onderzoekingen gedaan in Iiet Laboratorium der Utrechtsche 



Hoogeschool ; Deel I-V en VI. I. (zooveer verschenen) ; with plates, 6 vols. 8vo. boards {scarce), 

 \2s 6d Rotterdam, 1842-51 



12249 MULERIUS {sive MULIERS, vel MtJLLER] (Nicolas ; Univ. Groningen) Iud^eorum 

 Annus Lun.k-Solaris : et Turc-Arabum Annus mere Lunaris, recens uterqueesuis Fontibus 

 deductus, et cum Anno Romano facili Methodo connexus ; urith arms on last I., folio, old limp 

 vellum {a few U slightly browned, otherwise a FINE copy) ; rare, \bs Groningce, 1630 



The date is given on the colophon in the Christian, Jewish, and Muslim eras. 



12250 MTJNGKE (Georg Wilbelm, hie G. H. ; Univ. Heidelberg) Uber die AUSDEHNUNG der 

 tropfbaren Flussigkeiten durch Warme, 4to. (pp. 165), sewn, 5s o. 0., 1828 



Unknown to Poggendorff, 



