The backs of Sheraton chairs had straight tops and several small splats joined to a cross-rail, and not to the seat. The legs were straight.
Sheraton introduced the use of turned work on the legs and outer supports of the backs of chairs, and produced fine examples of painted furniture, especially painted satin-wood. He, also, did some very fine inlaying and used cane in the seats and backs of chairs which he painted black and gold. Among those who decorated for him was Angelica Kauffman.
Heppelwhite chairs are unmistakable on account of their _shield_, _heart_ or _oval_ backs and open splats, which were not joined to the seat in the centre of backs. The most beautiful were those with carved Prince of Wales feathers, held together by a bow-knot delicately carved. They were sometimes painted. The legs of Heppelwhite furniture were straight.
We see in the book published by A. Heppelwhite & Co., a curious statement to the effect that cabriole chairs were those having stuffed backs. This idea must have arisen from the fact that many chairs of the eighteenth century with cabriole legs, did have stuffed backs.
Robert Adam, born in 1785, was an architect and decorative artist. The Adam rooms, walls, ceilings, mantels, etc., are the most perfect of the period; beautiful classic mouldings encrust ceilings and sidewalls, forming panels into which were let paintings, while in drawing-rooms the side panels were either recessed so as to hold statuary in the antique style, or were covered with damask or tapestry. It is stated that damask and tapestry were never used on the walls of Adam dining-rooms. James Adam, a brother, worked with Robert.
Every period had its own weak points, so we find the Adam brothers at times making wall-brackets which were too heavy with ram's heads, garlands, etc., and the Adam chairs were undoubtedly bad. They had backs with straight tops, rather like Sheraton chairs, and several small splats joining top rail to seat. The bad chairs by Adam, were improved upon by Sheraton and Heppelwhite. The legs of Adam furniture were straight.
The ideal eighteenth century interior in England was undoubtedly an Adam room with Heppelwhite or Sheraton furniture.
Sir John Soane, architect, had one of the last good house interiors, for the ugly Georgian style came on the scene about 1812. Grinling Gibbons' carvings of heavy fruits and flowers, festoons and masks made to be used architecturally we now see used on furniture, and often heavily gilded.