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he affirms to be an *Excrementitious Succus*, by Nature secreted in its proper *Follicule* near the *Anus* of an *Animal* of the *Dog-kind*, and not the *Sperm*, as some have asserted. *Castor* he proves to be the *Scent-bags* adjoining to the *Intestinum Rectum*, and not the *Testicles* of the *Beaver*, as some assert. In the Fourth and last Book our Author takes notice, that the *Sal Armomiac* of the Shops is a factious *Salt* made of *Human Urine*, *Soot*, and *common Salt*, and is not that of the *Ancients*, which *Pliny* and others affirm to be found among the Sands of *Lybia*. And lastly, Observes that *Mumia* is of four sorts; all which he doth demonstrate. And here I shall finish my Account, recommending to those which desire further Satisfaction in the *Materia Medica* the Book itself, which is of excellent Use to all *Physicians*, *Philosophers*, *Apothecaries*, *Chirurgions*, and *Drugsters*. --- **Advertisements.** The Reader is desired to Correct a Mistake in *Philosophical Transactions*, Numb. 202. p. 824. The Truffles there mentioned being discovered at Rushton in Northamptonshire, by the Learned Physician Dr. Harston of Harborough in Leicester-shire. *Libri quidam novi qui prostant apud S. Smith, & B. Walsford, ad insignia Principis in Cæmiterio D. Pauli, Acta Eruditorum ab Anno 1682. ad 1692. inclusivè cum tredecem Supplimentis.* *Indices Generales Actorum & Rerum primi Actorum Eruditorum quæ Lipsiæ publicantur Decennii rec non Supplimentorum Tomi primi.* Genesis Genesis sive Mosis Prophetæ Liber primus, Translatione Joannis Clerici, cum ejusdem Paraphrafi perpetua, Commentario Philologico Dissertationibus Criticis quinque, & Tabulis Chronologicis. Amst. 1693. Fol. Reliqui Mosis Libri quatuor sub praelo sudant, totum opus in omnes veteris & Novi Testamenti Libros cum Paraphrafi & Commentario ejusdem Authoris in sex Tomis prodibit. Wilhelmi Ernesti Tentzelii Exercitationes selectae in Duas Partes distributae: Quarum Priori præter Symbolum Apostolicum, Clementis Romani, Ignatii, Polycarpi, Justini Martyris, Athenagoræ, Theophili, Antiocheni, Tatiani, Hermiæ, Jacobi Nisibensis, & Ephremi Syri, Scripta expenduntur, plerorumque vita præmissa; Tum Constantini Magni Baptismus, Natalitia Episcoporum, Hymnusque, Te Deum Laudamus, illustrantur: Posteriori, Disciplina Arcani in Apricum producitur, aliaque Antiquitatis Ecclesiasticae Capita explicant: cum Indicibus. Quarto. 1693. LONDON: Printed for S. Smith and B. Walford, Printers to the Royal Society, at the Prince's Arms in St. Paul's Church-yard, 1693.