Pharmacopœia Bateana, or, Bate's dispensatory translated from the second edition of the Latin copy, published by Mr. James Shipton : containing his choice and select recipe's, their names, compositions, preparations, vertues, uses, and doses, as they are applicable to the whole practice of physick and chyrurgery : the Arcana Goddardiana, and their recipe's intersperst in their proper places, which are almost all wanting in the Latin copy : compleated with above five hundred chymical processes, and their explications at large, various observations thereon, and a rationale upon each process : to which are added in this English edition, Goddard's drops, Russel's pouder [sic], and the Emplastrum febrifugum, those so much fam'd in the world : as also several other preparations from the Collectanea chymica, and other good authors / by William Salmon ...

X. Oleum Martis, Oyl of Mars, or Iron.

Bate.] It is made of the Rust of Mars, contracted by sprink∣ling it with Aqua Stygia, then washing it with Water, fil∣tring and exhaling it to an Oleagniosity, S. A. It is one of the greatest Deobstructors in the World. Dose gr. iv. or v. &c.

Salmon.] § 1. This is not Oleum Martis, for that is Oyl made of the Vitriol of Mars, of which we have nothing to say here, for that there is no difference in the preparation thereof, from that of the pre∣paration of the Common Oyl of Vitriol, all the same Rules, Directions and Cautions be∣ing to be observed in the one, that is observed in the other. § 2. This here is rather a Tin∣cture of Mars extracted with common Water, the Body of the Mars being beforehand opened with Aqua Fortis, or Spirit of Nitre, by virtue of which the Tincture of the Mars is extracted by the Water; which being filtred and abstracted to the thick∣ness of Oyl, receives its deno∣mination from the likeness which it has thereto. § 3. Le Mort makes it after this man∣ner: ℞ Filings of Mars ℥ xiv. Spirit of Common Salt ℥j. fair Water ℥viij. mix, and digest for three or four days, stirring it twice a day: then add Cry∣stals of Tartar in fine Po••der ℥viij. mix them well again; and add fair Water again a sufficient quantity, boyl them together for an hour in an Iron Pot or Kettle, continually ad∣ding fresh Water, as the Mat∣ter evaporates; then filter, or let it settle, pouring off the clear Liquor, which evaporate to the consistency of a thin Sy∣rup: add an half part of recti∣fied Spirit of Wine, and keep it for use. § 4. Lemery makes it thus: ℞ Rust of Iron ℥xij. White Tartar lbij. Pouder and mix them together, then boyl

them in an Iron Pot with lbxij. or xv. of Rain-water for 12 hours with a soft fire: stir the matter with an Iron-slice often, of al∣most continually, taking care to put in more boyling Water into the Iron Pot, according as it consumes: then leave it for a while to settle, and you will have a black Liquor, which fil∣trate and evaporate in an Ear∣then Pan over a Sand heat to the consistence of a thin Syrup, or till a little pellicle rises upon it. § 5. Now here is to be noted in this Preparation, that Water alone would not be strong enough to pene∣trate the Iron, so as to make a Tincture, tho' it should be boyl'd for a year together; and therefore our Author in his way, makes the Rust with Aqua Stygia. § 6. Le Mort uses Spirit of Salt, and a small proportion of Tartar; but Lemery, because he uses no Aqua Fortis, nor Sp. Salis, takes so much the larger a propor∣tion of Tartar; with these things the Water being im∣pregnated it dissolves the Mars very easily, and gives it strength enough to extract almost its very Soul. § 7. But you must not think that this Oyl-like Body is a perfect solution of Mars; for if there was an intire solution of it, there would appear no more Tincture than there does in the Solution of it, with Spi∣rit of Vitriol and Water; but because the soluble parts of the Tartar, which is the A∣gent in this Operation is only an impure acid Salt, it can but grosly rarifie or open the Mars, and after mixing with it, keep it suspended in the Water. § 8. After the Tin∣cture is drawn, there remains a whitish matter, which may be cast away as nothing worth, being a mixture of the grosser and unclean parts of the Tartar and Mars. and the Tincture has a sweetness in it, from whence, as also from its Consistence or Body, some are pleased to call it a Syrup: Others an Oyl, tho' in truth, it is neither. § 9. It is brought by evaporation to the consistency of an Oyl or Syrup, that it might keep the better; but Le Mort thought good to add to it Spirit of Wine for its greater security and preservation.