ANCIENT STATE OF SqiENCK. ^J 



L M, the two handles of the plough, the lower extremities Defcription of 

 of which are fixed in the two outer beams C E, and connected .'Pf'^^Z 



. ' Wright s threc- 



by a crofs piece N, to make them firmer. The handle L is furrow plough* 

 longer than the handle M, in the fame proportion as the beam 

 C is fliorter than the beam E. 



O P, two upright pieces of iron fixed in the crofs piece F, 

 having two holes at their fummits for the reins to pafs through 

 which guide the horfes. 



S, an iron bar which Hides up and down near one end of the 

 crofs piece F, to raife or lower the wheel A. 



Fig. 2. Shows a detached portion of the llrong crofs piece 

 F, to explain the manner in whicli the whiple-tree (liifts (R) 

 are fixed in front of that crofs piece, fo as to regulate or equalize 

 the power of the horfes, 



S, a bar of iron, the lower part of which forms the axis of 

 the wheel A, the upper part Aides in a groove, in the crofs 

 .piece, F, and has holes at different diftances. It may be re- 

 tained at any height by an iron pin T, which pafTes through the 

 crofs piece, and one of the holes of the iron bar. The real 

 ploBgh is nine feet long to the extremity of the handles and each 

 cutter turns a nine-inch furrow j from centre to centre of the 

 beams, being nine inches. 



VII. 



Qn the Slate of Science among the earlier Nations of Antiquiti/ ; 

 and more efpecially of thofe Refearches v^hich corifiitute the 

 Subjeds of Alchemy. In a Letter from E. P. 



To Mr. NICHOLSON. 



, Rofcommon, April 1 , 1 804-. 

 SIR^ 



IT is an authenticated fa6l, that much of our late fcienlific Reafons for 

 acquifition, and many of thofe fads which the experimental thinking that 



r ., r i. • 1 -1 1 • • . 1- 1 X ... the modern fci- 



genius ot the prelent age is daily bringing to light as original gnces were 

 difcoveriesi were well known in more ancient periods of the known to ami- 

 world; and there is abundant reafon for fuppofing that, in che- *^"' ^' 

 miftry and metallurgy, the philofophers of thofe ages were fu- 

 perior to thofe of the prefeint day, , 



But 



