Some Persons are liable to certain Symptoms and Appearances, which arise from the same Cause as an Apoplexy; and which indeed may be considered as very light benign Apoplexies, of which they sustain many Attacks, and yet without any considerable Annoyance of their Health. The Blood, all at once as it were, flushes up to their Heads: they appear heedless or blundering; and have sometimes Disgusts and _Nauseas_, and yet without any Abatement of their Understanding, their Senses, or Motion of any Sort. Tranquillity of Mind and Body, once Bleeding, and a few Glysters usually carry it off soon after its Invasion. The Returns of it may be prevented by the Regimen directed Sec. 150; and especially by a frequent Use of the Powder No. 24. At the long Run however, one of these Attacks commonly degenerates into a mortal Apoplexy: though this may be retarded for a very long Time by an exact Regimen, and by avoiding all strong Commotions of the Mind, but especially that of Anger or violent Rage. __Chapter X.__ _Of the violent Influence, or Strokes, of the Sun._ __Sect.__ 152. This Appellation is applied to those Disorders, which arise from too violent an Influence of the Heat of the Sun, immediately upon the Head; and which in one Word may be termed _Insolation_. If we consider that Wood, Stone and Metals, when long exposed to the Sun, become very hot, and that even in temperate Climates, to such a Degree, that they can scarcely be touched without some Sensation of burning, we may easily conceive the Risk a Person undergoes, in having his Head exposed to the same Degree of Heat. The Blood-Vessels grow dry, the Blood itself becomes condensed or thickened, and a real Inflammation is formed, which has proved mortal in a very little Time. It was this Distemper, a Stroke of the Sun, which killed _Manasses_ the Husband of _Judith_. 'For as he was among the Labourers who bound up the Sheafs in the Fields, the Heat struck upon his Head, and he was taken ill; he went to Bed and he died.' The Signs which precede and attend this Disease are, being exposed in a Place where the Sun shines forth with great Force and Ardour; a violent Head-ach, attended with a very hot and extremely dry Skin: the Eyes are also dry and red, being neither able to remain open, nor yet to bear the Light; and sometimes there is a kind of continual and involuntary Motion in the Eyelid; while some Degree of Relief is perceivable from the Application of any cooling Liquor. It often happens that some cannot possibly sleep; and at other times they have a great Drowsiness, but attended with outrageous Wakenings: there is a very strong Fever; a great Faintness, and a total Disrelish and Loathing. Sometimes the Patient is very thirsty, and at other times not at all: and the Skin of his Face often looks as though it were burnt.