IN like manner, supposing such _Women_ to conceive in their Minds, some deformed _SPIRIT_ or _ANIMAL_, with _Horns_, _Snout_, _Wings_, _Cloven-Feet_, &c. (as has sometimes happen’d) What should hinder this _Woman_ to produce a BIRTH with these _Monstrous Marks_? THIS is also therefore very possible, but more especially, when the _Disposition_ of the MATTER acquiesces, which it certainly does when the SEED and BLOOD are impure: For, Is it not manifest to our _Eyes_, that some CHILDREN bring with them long _Hair_ and _Nails_ into the World, merely from the _Impurity_ of these _material Substances_? Then supposing the _Force_ of an absurd _Imagination_ to have seconded the _Efficacy_ of such _Sordid Stuff_, what a MONSTER might not _these_ Jointly have produced? Wherefore I shall only add upon the whole of _This_, that as such impious and foolish _Imaginations_ ought to be suppressed, so both the SEED and the BLOOD ought to be pure and temperate, to prevent such _præternatural Productions_. NOW, as to the _Heat_ and _Spirit_ contain’d in the SEED, we may easily conceive its _Effects_, and such as have been in _Glass-Works_, and have seen GLASSES, made, may readily comprehend how MONSTERS are formed in the WOMB: For in modeling the GLASS, if the _Work-Man_ blow the PIPE too much or too strongly, the _Stuff_ is so extended, that the GLASS becomes both _longer_ and _wider_ than its due proportionable FORM; and so it may also happen in the WOMB, by an _immoderate Action_, or too great an _Extension_ or _Diffusion_ of the SEMINAL SPIRIT, which sometimes may only affect some _particular Part_, such as the HEAD, NOSE, MOUTH, EARS, _&c._ and sometimes the _whole_ FOETUS disproportionably. SECONDLY, Hence we may rationally conclude, that a _superfluity_ of SEED, and _super-abundancy_ of material HUMOURS may, in like manner, produce _duplicated Members_, such as _Two_ HEADS, _Four_ HANDS, _Four_ FEET, _Six_ or _more_ TOES or FINGERS, _&c._ and _this_ especially, in case of the _Woman’s_ strange _Imagination_ concurring; which may easily happen, by fancying herself sometimes to _see double_ with her EYES, which _Deception_ may probably proceed from the _Concourse_ of HUMOURS, gross VAPOURS, and confused or distracted SPIRITS. And _This_ in short, it is evident, holds also good among the _other Creatures_ (IRRATIONALS) as _Lemnius_ writes[208] of himself, that He saw a _Sheep_ and a _Calfe_, each with _two_ HEADS, and a _Hen_ with _four_ FEET and as many WINGS. AGAIN, as from the _Superabundance_ of MATTER, _Geminated Members_, or Superfluous Particles may proceed; so from the _Scarcity_ of these MATTERS, _Want_ of requisite _Aliment_, or from any partial _Invalidity_ of the _Natural Faculties_, some _Members_ or certain _Particles_ may be either maim’d and destitute of their _Natural Use_, or then (which is worse) be altogether _irregular_, _defective_, or _Unnatural_.