62 On the Means of gaining Power in Mechanics. 



Barom. Therm. Results. 

 Feb* 23, Hill top - - * - - 29*758 51 

 Thames* side - - - 29*912 



Feet. 



•154 139* 



Feb. 24, Hill top - - - - -« 30*180 53 

 Thames* side - - - 30-334 54 



• 154 - - . . HO 



On the Signal Hill at Bright helmsf on* 

 In 1796 with a barometer of Ramsden*s. 

 Signal House above High water mark - • 4 Id 

 In 1806, with my barometer ^ * - - - 403 



416 

 418 



Devil's Dyke, near Brigkfhehnston, 

 In 17S85 with a barometer of Ramsden's - -^ 697 

 In I8O6, with my barometer ----- 695 



Lord Ahercorn*s Lodge, at Staimiore, above the Strearft 

 in Ed g ware Town, 



Feet. 



Jan. 3, ----- 306 

 Jan. 7, - - - ^ - 306 



The observations from which this height was deducec^^ 

 were made in the chaise, both on Jan. 3 and 7. 



XII. On E. V.'s Article '^ On the Means of gaining Power 

 in Mechanics^* 



To Mr, Tilloch, 

 sin, 

 J\ coRRESPONDENNT asserts in your Magazine for last 

 month*, that he has a machine with which, by the appli- 

 cation of 2lb. descending through three h^it, he raises 20lb* 

 through two feet. He wishes to have some person's opi- 

 nion of it through the same medium. You possibly may 



* Phil. Mag. Vv>l.ixlx. p. 351. 



have 



