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Among the Objections, (which the Author finds to be generally grounded upon inconsiderations, mistakes, and a supposition, as if peremptory Affirmations touching the effects of this Transfusion were obtruded, whereas all is left to the success of Experiments faithfully made) there is one, directed against the effects of that operation, which appeared in the young Man, who (by Mr. Denys's Relation in his printed Letter to Monsieur De Montmor) after he had received the Arterial Blood of a Lamb, was cured of an extraordinary Lethargy, consequent to a violent Feaver wherein he had been let blood 20 times. And the Objection is, That the lively apprehension the said young Man had of a remedy so unusual, and whereof the success could not but appear very dubious to him, and so render him exceedingly anxious, did so rouse his spirits, and put them into such motion, as to disengage from that embarasment, which hundred their diffusion; upon which disentanglement follow'd all the other good effects, that are imputed to the Transfusion.
To this Conceit the Answerer replies, That if the Apprehension could have cured this young Man, the Cure would doubtless have been effected 24 hours before the Transfusion, because he then happen'd to have a very great one by falling down stairs; as was also observed in Mr. Denys his Relation of this Experiment. Besides, that this Patient was noted to be so far from apprehending or fearing this Operation, that he did not so much as know, what the Transfusion was; but thought, the Lamb was only applied to his Arm, to suck from him his ill Blood, as he was made to believe, after an ancient and usual way.
To that Objection, wherein some put weight, viz, That there is a great difference between the Flesh we eat for food, and the Blood that is transmitted immediately into the Veins; the former undergoing a great Alteration, which the latter does nor: Our Author replies, That of, the three principal Digestions of the Aliment, that have been always distinguish'd by Authors, the First, which is made in the Stomach, is not considerable in comparison of the two others, which are made of the Chyle and the Blood, in the Heart, the Liver, and generally in all the parts that receive nutrition, which he illustrates by this: That as the Concoction, which is made of the Juices of the Earth in the Root
