34 



GENERAL INDEX. 



Mercurial and alcoholic thermometers, by De Witt 

 Mercury, account of that planet ..... 

 Meridians, denned and described .... 

 Metals, table of the relative expansion of different . 



tables of their different degrees of oxidability . 



ignited and melted by the galvanic battery . 



colours produced by their combustion 



tables of their comparative thermo-electric relations 

 Met llic solutions decomposed by galvanism 



thermometers of De Luc ..... 

 Regnier .... 

 Crichton . 



THERM. 

 POP. INT. 



ELECT. MAGN. 



GALV. 



THERM. 



Page 

 55 

 . 35 

 41 



17 

 22,23 

 11, 14 

 . 13 

 94 



. 16 

 . 24 

 . 29 

 30,31 

 conductors for the safeguard of ships and buildings ELECT. . 59, 60 



of Fitzgerald . 20, 21 



Metalline thermometer, or pyrometer, of Breguet . . THERM. . 32, 33 



of Houriet . . . . 33 



Microscopes, their principles and construction . . POP. INT. . . 98 



Micrometer-pyrometer of Smeaton, described . . . THERM. . 18 20 



Micrometers of various kinds, construction of . OPT. INST. . 56, 57 



circular construction of . . . . . . 59, 60 



Micrometrical eye-piece, by Ramsden, described . . . 14 



Microscopes, on their invention and antiquity . . . . 33 



theory of single ..... . % 33 



. . of compound ..... . . 43 



singly-reflecting ..... . 43 



reflecting, proper form of their mirrors . . . . 48 



Amician reflecting ..... . 48 



compound, proper size of ... 48 



mechanical arrangement of ... . 44 



method of determining their magnifying power . . 45 



. object-glasses for . . . . . . . . 46, 47 



test-objects for ..... . . 49 



fluid . . 42 



small, made of glass globules ... .38 



diamond and sapphire ..... . . 39 



table . 36 



for objects of natural history . . . . . 47 



periscopic, of Dr. Wollastoii . . . . . 40 



opaque ....... . . 50 



solar POP. INT. 99. OPT. INST. 50, 51 



lucernal ....... OPT. INST. . 52 



smallest magnitude visible by . . . . 32 



Microscopic lenses, method of grinding .... . . 35 



pyrometer of De Luc THERM. . 23, 24 



ofRamsdeii . .24,27 



Middletori's experience of the effects of cold on magnetism OPT. INST. . .14 

 Minimum of spherical aberration in lenses . . . MAGN. . . 13 



Mirrors, description of the different kinds and their effects POP. INT. . 80, 85 

 Mirrors, plane, their images and reflections, concerning . OPT. INST. . 2 



concave . . 2 



curious experiments with their images . . . 3 



used as burning-glasses, Archimedes's, &c. . 1, 3, 7 



convex, images of . . . . . . . . 3 



of reflecting microscopes, proper form of . . . . 48 



telescopes . . . . . . . 15 



spherical aberrations in ..... . 1 1 



MITCHELL'S method of making artificial magnets by double 



touch ......... . 46, 47 



Modifications of differential thermometers .... THERM. . 39 45 



Momentum of bodies denned and illustrated . . . POP. INT. . . 11 



. . measurement of .... . .11 



Monsoons, description and cause of .... . . 70 



Moon, general account of ...... \ . 49 55 



.. her motion and phases explained , . . . . 50,51 



.. concerning the eclipses of . ~~ . . 51,52 



Moons of Jupiter, Saturn, and the Georgium Sidus . ^ 



MORTIMER'S pyrometer, described .... THOTM. . .17 



MORVEAU'S platina pyrometer, description of . . . 29, 30 



.. table of temperatures . . . . . . . , 30 



