egular, with maximum in June, and
minimum in January.

[165] This holds good of a south European country, taken separately. A
chart of the annual incidence of suicide by hanging, in Roumania,
presented by Minovici (_Archives d'Anthropologie Criminelle_, 1905, p.
587), shows climaxes of equal height in May and September.

[166] Morselli, _Suicide_, pp. 55-72.

[167] Ogle himself was inclined to think that these breaks were
accidental, being unaware of the allied phenomena with which they may be
brought into line. It is true that (as Gaedeken objects to me) the
autumnal break is very slight, but it is probably real when we are dealing
with so large a mass of data.

[168] _Pedagogical Seminary_, June, 1891, p. 298. For a very full summary
and bibliography of investigations regarding growth, see F. Burk, "Growth
of Children in Height and Weight," _American Journal of Psychology_,
April, 1898.

[169] _L'Annee Psychologique_, 1898.

[170] _Lancet_, June 6, 1891. Edward Smith had pointed out many years
earlier that scarlet fever is most fatal in periods of increasing
vitality.

[171] Havelock Ellis, "The Bladder as a Dynamometer," _American Journal of
Dermatology_, May, 1902.

[172] See, e.g., summary in _Internationales Centrablatt fuer
Anthropologie_, 1902, Heft 4, p. 207.

[173] Summarized in _Zeitschrift fuer Psychologie der Sinnesorgane_, 1903,
p. 135.

[174] Camerer found that from September to November is the period of
greatest metabolic activity.

[175] Haig, _Uric Acid_, 6th edition, 1903, p. 33.

AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL
IMPULSE.

I.

Definition of Auto-erotism--Masturbation only Covers a Small Portion of
the Auto-erotic Field--The Importance of this Study, especially
To-day--Auto-erotic Phenomena in Animals--Among Savage and Barbaric
Races--The Japanese _rin-no-tama_ and other Special Instruments for
Obtaining Auto-erotic Gratification--Abuse of the Ordinary Implements and
Objects of Daily Life--The Frequency of Hair-pin in the Bladder--The
Influence of Horse-exercise and Railway Traveling--The Sewing-machine and
the Bicycle--Spontaneous Passive Sexual Excitement--_Delectatio
Morosa_--Day-dreaming--_Pollutio_--Sexual Excitement During Sleep--Erotic
Dreams--The Analogy of Nocturnal Enuresis--Differences in the Erotic
Dreams of Men and Women--The Auto-erotic Phenomena of Sleep in the
Hysterical--Their Frequently Painful Character.

By "auto-e