A tenth letter to Sir Joseph Banks Baronet President of the Royal Society, [electronic resource] : on the Subject of Cochineal Insects, discovered at Madras, By James Anderson M. D. With a Copper Plate Engraving Annexed, of the different Insects mentioned in the Letters, from the Drawings of Baron Reichel. Also an Engraving of the Opuntia Major Spinulis obtusis mollibus, & innocentibus, and the Plan of a Nopalry in the Bishoprick of Guaxaca in the Kingdom of Mexico, Extracted from the Second Volume of Sir Hans Sloane's History of Jamaica, for the use of Country Gentlemen who may be disposed to make Plantations, and are not in possession of that Work.