A^'w Publlcatmis. ^6^ 



feet nine Inches. It was originally in one piece of Parian 

 marble. 



It was purchafed at the public fale of Lord Cawdor's mu- 

 ffeum in Oxford-ftreet, the 6th of June iSoo^ for feven hun- 

 dred guineas, and is now in the polTeffion of the Duke of 

 Bedford, who has caufed it to be removed to Woburn Abbey, 

 where it is to be placed in an appropriate fituation, in the 

 centre of an extenfive and beautiful greenhoufe, def:gned and 

 executed for his Grace by Mr. Holland. 



I am, Sir, 



Yours, &c. 

 Charles Heathcote Tatham. 

 To the Editor of Vhilojophical Magazine. 



NEW PUBLICATIONS. 



New Ohfervations concerning the Inflexions of Light, accom- 

 panying thofe of Newton, hut differing from his, and ap- 

 pearing to lead to a change of his Theory of Light and, 

 Colours. Cadell and Davies; 1799. 134 Pages, with 

 Eight Copperplates. 



JL HE author of this effay has carefully repeated thofe 

 experiments by which Sir Ifaac Newton elfefted his analyfis 

 of light. The experiments have produced to his obfervalion, 

 phenomena materially different from thofe which appeared to 

 Newton. He feems to. have obferved the phenomena with 

 very accurate attention. He concludes from the whole, that 

 Newton has erred in believing every ray of common light to 

 be compofed of feven differently coloured, primigenial, ele- 

 mentary rays. On the contrary, this author infers from his 

 ohfervations, that all light is originally of one uniform white 

 colour', that its diverfity of colours, in inflexion, is occajioned 

 by the bendings, feparations, and other changes of its parts in 

 faffing through a tranfparent medium, or under attratiion by 

 the edge, angle, or fide of an approaching body ; and that, by 

 confequence, the Newtornan Theory of light and colours i$ 

 ^ot fundamentally true. 



The apparent accuracy of thefe obfervations ', the logical 

 7 fairncfs 



