XIII.--THE MICROSCOPE.

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


XIV.--PHYSICIANS--DISEASE GERMS.

High rank of Physicians--Former and present duties--Periodical
visitations--Microscopes--Perspiration indicating disease--Exact
nature of disease not shown--Example--Ordinary appearance of
perspiration--Lung disease and consumption--Lung dew--"The
Scraper"--The breath


XV.--MADNESS.

Minute divisions of brain examined by microscope--Former
neglect--Early indications rarely noticed--Supposed lunatics often
wiser than their keepers--An instance--The man's statements laughed
at--World believe him a confirmed madman--Madness not now assumed