Plants; at fixteen Inches and half, temperate; at eighteen Inches, warm Air, which is his Standard for Pine-Apple Heat; at twenty Inches he marks hot Air; and one and twenty Inches and half, fultry: But these Degrees are differently mark'd from the fame Denominations in our common English Thermometers; his temperate is about our warm Air; his warm Air, our hot Air; and his hot Air is about the fame with our fultry.

I think there cannot be any Inftrument more useful to Gardiners, who have the Management of Stoves or hot Beds, than Thermometers, regulated according to these Obfervations; and I have therefore directed fome to be made for hot Beds as well as Stoves, by which we may at once be appriz'd of the Degree of Heat under the Line, and of the feveral Degrees distinctly mark'd for the natural Plants of every Climate, from the Line to the fifty fecond Degree of Latitude.

In these Thermometers I fhall mark the Names likewise of the principal Places, with their Degrees of Latitude and Summer Heat, whether they lie North or South of the Line, and alfo the different Times of Spring in the several Countries I fhall mention, that fo every Gardiner may understand when it is proper to apply his Heat in full Force, and what Degree of Heat he ought to use for the Welfare of any Plant he' receives from any Part of the World: Thefe Inftruments may be had of Mr. John Fowler, Mathematical Inftrument maker, in Swithin's-Alley, near the Royal-Exchange.

But because every one of my Readers may not, perhaps, rightly understand the meaning of Thermometer or Thermofcope, I fhall here explain

it:

it: The Thermometer is an Inftrument commonly made of Glafs, fill'd with tinged Spirit of Wine, or fome other proper Liquor, defign'd to measure the Degree of Heat or Cold of any particular Place, or at the fame Place at different Times and Seafons.

At the Bottom of this Inftrument is a pretty large Ball of Glafs, fill'd with tinged Liquor; out of which rifes a Stem or Tube about three or four Foot perpendicular: To adjust the Degrees of which, the Ball may be placed in Water which is just beginning to freeze, and then noting the Height of the Spirit in the Stem, make any particular Mark against it, O for Example; and graduate it afterwards up and down for Heat and Cold: This is us'd with us, and fhews the several Degrees of Heat or Cold in our Climate. But befides this Inftrument, it is neceffary our Husbandmen and Gardiners fhould be acquainted with fome others, which will inform them of the Approach of wet or dry Weather, that their Affairs in the Fields and Gardens may be directed with fome Certainty. The firft is

The Barometer or Barofcope, an Instrument for eftimating the minute Variations of the Weight or Preffure of the incumbent Air; it is a long Tube of Glafs hermetically feal'd at one End, and being fill'd with Quick-filver, is inverted fo as to have the open End of it immers'd or dip'd in ftagnant Quick-filver, contain'd in a larger Glafs under it; which larger Glafs is expos'd to the Preffure of the outward Air (after fuch Immerfion) the Quick-filver in the Tube being fuffer'd to run as much as it will into the ftagnant Quick-filver, in which that Mouth or open End is immers'd, there is wont to remain a Quantity

Quantity of Quick-filver fufpended in the Tube, about twenty eight, twenty nine, or thirty Inches high, measuring from the Surface of the stagnant Quick-filver perpendicularly; but more or lefs within fuch Limits, according as the Weight or Preffure of the Air, incumbent on the external ftagnant Quick-filver expos'd to it is more or lefs, leaving the upper Part of the Tube void, or at least empty of common Air.

The next is the Hygrofcope or Hygrometer, an Inftrument contriv'd to fhew the Moisture or Dryness of the Air, according as it abounds with moift or dry Vapours, and to measure and eftimate the Quantity of fuch Moisture or Drynels. Of this and of the foregoing fort there are many Varieties, which I fhall mention and explain more fully hereafter, for the Advancement of Husbandry and Gardening; but I cannot conclude this Chapter, without obferving, that if the Method of cultivating this Fruit or any others that are famous in the Eaft or Weft-Indies was rightly underflood, we might be fupplied with them in every Month of the Year; the Guava has been brought to Ripeness at Chriftmas, by the Directions of the late excellent Dutchess of Beaufort.

What remains yet to be explain'd of Fig. V. is, that C represents the Bloffom of the Ananas in its full Proportion upon the Knot which it grows upon, as it appears at the Time of Flowering.

D is one of the Knots of the Fruit in its full Bignefs, when the Fruit is ripe and has been well manag'd.

CHAP.

CHA P. III,

Obfervations on the Management of the Ananas or Pine-Apple, fince Mr. Telende's Method was publish'd, and of the extraordinary Growth of the fen fitive Plant, humble Plant, and others, from the warmer Parts of the Weft

Indies.

S

INCE I publish'd Mr. Telende's Account of managing the Pine-Apples, I find that his extraordinary Success has encourag'd a great many to undertake the Culture of that delicious Fruit; and though the Stoves which have been built by fcveral Gentlemen for that Purpose, vary in fome little Matters from the Stove at Sir Matthew Decker's at Richmond: Yet I do not find any of them that have been try'd, but what produce fome extraordinary Effect or other, which leads us more into the Knowledge of the Humour of that curious Plant, as well as others which are Natives of the fame Climate.

The new Frame at the Phyfick Garden at Chelsea, wherein only the Ufe of the Tanners Bark has been try'd this Summer 1723, by Mr. Miller, the curious Gardiner there, is an Inftance, that it is not impoffible to bring Plants of the

Latitude

Latitude of eighteen or twenty Degrees to the utmost Perfection. About the beginning of August, I obferv'd the fenfitive Plants there about feven Foot high in Bloffom, and the humble Plants were then preparing to put forth their Flowers. The Plants call'd the Flower Fence, so much esteem'd in Jamaica for the Beauty of its Bloffoms, and fome others of the fame Country, are faid to be in greater Strength than they were obferv'd in Jamaica, confidering the Time of their Growth from Seed, which were put in the Ground the Spring of the fame Year; fo that now I hope my former Conjectures and Defigns will be rewarded, in seeing all the most excellent of the Indian Fruits brought to Perfection in England; for where fuch is the Suc cefs of a Frame defign'd for Summer Ufe, I have no Room to defpair.

But as for the Pine-Apples, which I defign more particularly to treat of in this Place; we have Inftances of their being brought to extraordinary Perfection at the Garden of the Right Honourable Spencer Compton, Efq; Speaker of the House of Commons, at Chifwick; and at that curious Gentleman's, Mr. John Warner's at Rotherhith, whom I had formerly Occafion to mention on Account of his excellent Vineyard. There are feveral Stoves now built by curious Gentlemen on this Account; but as they have not yet been prov'd, I fhall forbear to mention them particularly, only to take Notice, that that which was erected this Summer in the Gardens of William Parker, Efq; near Croydon in Surrey, commands the Admiration of all the Judges that have seen it, for just Architecture and good Contrivance; the Design of it, befides VOL. II.

U

the