PORTABLE STEAM ENGINE, 9S 



V. 



Defcription of a Portable Steam Engine, By Mr. Matthew 

 Murray. 



To Mr. NICHOLSON. 

 S I R, 



1 TAKE the liberty of haiidlng you the defcriptton of a port- 

 able fleam engine of my conflrudlion, which you will have 

 the goodnefs to infert in your Philofophical Journal. I wHl 

 juft ohferve it is reduced to the fewett parts that pradical utility 

 will admit, which mud neceflarily render it of great advantage; 

 as the (impiicity of its parts make it nearly impoffible to be 

 out of order with a very moderate degree of management. 

 The following defcriplion and reference to the plate -will ex- 

 plain the nature of this engine. 

 I am. Sir, 



Your much obliged humble fervant, 

 "^ MATTHEW MURRAY. 



Leeds, May 1th, 1805. 



Defcriplion of a Portable Steam Engine, PlateVlL 



A A Reprefents the ground or floor on which the engine Defcriptlon of a 

 flands. portable aaua 



B Sc6lIon of a recefs made in the ground for the beam O 

 to work in. 



C. Iron ciftern refting upon the ground or floor covering 

 the recefs for the beam. 



D An opening in the floor to admit a boy to oil the centers 

 of the beam. 



^ A double fieam cylinder, having an upright pipe in the 

 intermediate fpace, which effects a communication between 

 the top and bottom and the valve box G. 



F A fleam pipe that comrhunicates with the boiler through 

 which all the fleam pafTes and furrounds the inner cylinder in 

 its way to the valve box, prior to its application againft the , 

 pifton. 



G The valve box fixed upon a projeQion from the cyliB- 

 der bottom, having an opening or connexion with the interval 

 between the two c^^linders. In this opening U a regulating 



Talve 



