52 



4. An Introduction to a General System of Hydrosta- 

 ticks and Hydraulicks, wherein the most advantageous 

 Methods of Watering Noblemen's and Gentlemen's Seats, 

 Buildings, Gardens, &c. are laid down. With Sixty Copper 

 Cuts of Rural and Grotesque Designs for Reservoirs, Cata- 

 racts, Cascades, Fountains, &c.; 2 vols. 4-to. 1729.* 



5. A Dissertation on the True Cythesus of the Ancients ; 

 8vo. 1731; Is. 6d. A classic production. At the end, he 

 gives a Catalogue of the Seeds, &c. sold hy him at the 

 Flower-pot, over against the Court of Common Pleas, in 

 Westminster; or at his garden on Mill-bank. \ 



6. Country Gentleman's Companion, or Ancient Hus- 



* His Chapter on the Water-Works of the Ancient Romans, French, &c. 

 is charmingly written. Those who delight in the formation of rivers, 

 fountains, falls of water, or cascades, as decorations to their gardens, may 

 inspect this ingenious man's Hydrostatics. And another specimen of his 

 genius may be seen in the magnificent iron gateway now remaining at 

 Leeswood, near Mold, and of which a print is given in Pugh's Cambria Depicta. 



f In this volume is a letter written to Switzer, from his " ingenious friend 

 Mr. Thomas Knowlton, Gardener to the Earl of Burlington, who, on account 

 of his own industry, and the opportunity he has had of being educated under 

 the late learned Dr. Sherrard, claims a very advanced place in the list of 

 Botanists." This letter is dated Lansborough, July, 1728. I insert part of 

 this letter: " I hope, Sir, you will excuse the freedom I take in giving you 

 my opinion, having always had a respect for your endeavours in Husbandry 

 and Gardening, ever since you commenced an author. Your introduction 

 to, and manner of handling those beloved subjects, (the sale of which I have 

 endeavoured to promote) is in great esteem with me; being (as I think) 

 the most useful of any that have been wrote on these useful subjects. If on 

 any subject, you shall hereafter revise or write farther upon, any communi- 

 cation of mine will be useful or serviceable to you, I shall be very ready to 

 do it. I heartily wish you success in whatever you undertake, as it tends to 

 a publick good." Dr. Pulteney says of Knowlton, " His zeal for English 

 Botany was uncommonly great, and recommended him successfully to 

 the learned Botanists of this country. From Sir Hans Sloane, he received 

 eminent civilities." 



