Magdeburg hemispheres, experiments with, by Otto von Guericke, 17.
Magic squares, Franklin's proficiency in, 66.
"Magnetic spark" obtained by Faraday, 262.
Magnetization by induction, Boyle's experiments on, 34.
Magneto-electric machine, Faraday's, 262, 314.
Magneto-electric machines, Wilde's, 318;
objects to be aimed at in the construction of, 315.
=Maxwell=, James Clerk, birth and parentage, 279;
enters Edinburgh Academy, 280;
letters to his father, 280;
early papers before the Royal Society of Edinburgh, 281;
visit to Mr. Nicol, 281;
experiments with unannealed glass, 282;
enters the University of Edinburgh, 282;
enters Peterhouse, 282;
migrates to Trinity, 282;
degree in Cambridge, 283;
elected Fellow of Trinity, 284;
appointed Professor at Marischal College, 284;
marriage, 287;
essay on Saturn's rings, 285;
dynamical top, 285;
appointed professor at King's College, 287;
lecture on colour at the Royal Institution, 287;
work on the Electrical Standards Committee, 287;
appointed Professor of Experimental Physics at Cambridge, 288;
plans the Cavendish Laboratory, 288;
lectures at Cambridge, 290;
work on the Cavendish Manuscripts, 134, 293;
delivers the Rede Lecture, 293;
method of protecting buildings from lightning, 294;
death, 294;
colour-top, 295;
experiments on colour-blindness, 296;
colour-box, 297;
awarded the Rumford Medal, 297;
wheel of life, 297;
real-image spectroscope, 298;
discovery of stresses in Canada balsam, 298;
of the insensibility of the _fovea centralis_ to blue light, 298;
statistical method, 299;
explanation of the viscosity of gases, 299;
investigations of Faraday's lines of force, 300;
statement of the laws of electro-magnetic induction, 301;
mechanical illustration of the ether, 302;
explanation of induced currents, 304;
of the mechanical action between currents and currents, and
between magnets and currents, 304;
of self-induction, 306;
electro-magnetic theory of light, 306;
contrivance for overcoming the principle of the dissipation of
energy, 328.
Maxwell's experiment for showing electro-magnetic rotation, 258.
Mayer's determination of the mechanical equivalent of heat, 323.
Mechanical equivalent of heat, definition of, 193;
Rumford's determination of, 192.
Mercury, melting point of, 145.
Mirabeau's declamation on Franklin, 123.
Mixed plates, colours of, 223.
Moral perfection, Franklin's endeavour to attain, 56.
Mother-of-pearl, Young's explanation of the colours of, 224.