# Two Propositions Desir'd to be Answered in a Year and Half, by Any Person; if They are Not in That Time, the Proposer Promises He Will Do It Himself **Author(s):** Anonymous **Year:** 1699 **Journal:** Philosophical Transactions (1683-1775) **Volume:** 21 **Pages:** 3 pages **Identifier:** jstor-102618 **JSTOR URL:** --- it will weigh just as much as a Portée of 110 Aunes of Lyons, which is the general Rule for Calculating, when they draw the Silk out: By this means one may learn to adjust the weight. There are Silks of Piedmont which are very light and clean, and to be preferred before any, in Sale; The Portée of Silk of the lightest, weighs near twenty four Penny-weight to twenty five and twenty six Penny-weights the Portée; others twenty seven and twenty eight, which Weight may be dispensed with, on condition the other Qualities be as good, to wit, well wrought, Even, Fine, and Clean: But above these Weights they cannot be, unless they abate of their Profit, proportionable to what they want in lightness. V. Two Propositions desir'd to be Answered in a Year and half, by any Person; if they are not in that time, the Proposer promises he will do it himself. Quam à praeparationibus ac solutionibus Chymicis, varias, secunda corpora, subeant mutationes; de viis brevioribus, simplicioribus, ac magis naturales sollicitus indagant homines; praeter alias invenitur quod Dato nascente Vegetabili quolibet à nascendi modo, ejusdem cohaerendi nisus, seu partium ejusdem mobilitas ac immobilitas, determinari possunt. Que Quæ propter rogamus, quoslibet Botanicae, Medicinæ, Philosophiae, &c. Studiosos Methodum hujusmodi Propositionis invenire. Rogamus etiam, an esse possit signum aliquod, & quidnam sit illud, quod ex anatomia, ac cadaverum Dissectionibus certo poterit indicare quemlibet ob assumptum Opium interemptum fuisse? VI. Part of a Letter from Mr. Llwid to Dr. Tancred Robinson, F. R. S. concerning a Figured Stone found in Wales; with a Note on it, by Hans Sloane, M.D. I Here send you the Representation of a Limestone-Marble, we have lately Discovered in this Country, when Polish'd. We have Plenty of it; but few pieces exceed Six, Nine, or Twelve Inches Diameter; for 'tis only a sort of Alcyonium, incorporated in several small blocks of the Lime-stone; whereof the first Figure represents a piece polish'd Perpendicularly, and the other Horizontally. I would intreat you to Discourse some Stone-Cutter, and to advise me what Uses it might seem proper for, &c. 'Tis (to me) more Beautiful than the Florentine Marble, but much more hard and substantial. I should be glad of a Line or two about it. Vide Fig. 3. & 4.