Properties of optical instruments increased by electricity--
CONCENTRATED LIGHT--The illuminated worm--Light attracted by the
enticer-machine--Concentrated light in Music--Human voice and
musical instruments--Union between the soul and perishable portions
of man--Concentrated light within us--Similarity of terms applied
to the brain and to vision--Strength to the intellectual
powers--EXPERIMENT ON LIVING MAN--Electrical currents in brain--How
agitated--Rarity of the experiments--Serious consequences to
patient--Conditions imposed, and advantages secured, to him--Not
allowed to marry