Fire-places and Kitchen Utensils. 283 



become necessary when Roasters are made very large. 



Of various Alterations that may be made in the 

 Forms of Roasters, and of the Advantages and 

 Disadvantages of each of them. Account of some 

 Attempts to simplify the Construction of Roasters. 



Of a Roas ting-oven. Of the Difference between 

 a Roasting-oven and a Roaster. 



A LTHOUGH it will be easy for persons acquainted 

 *V with the mechanic arts, and accustomed to exam- 

 ine drawings and descriptions of machines, to form a 

 perfect idea of the invention in question from what has 

 already been said, yet something more will be necessary 

 for the instruction of artificers who may be employed 

 in executing the work, and more especially for such 

 as may from these descriptions undertake to construct 

 roasters without ever having seen one. By going into 

 these details, I shall no doubt find opportunities for 

 introducing occasional remarks on the uses and man- 

 agement of the various parts of the machinery, which 

 will tend not a little to illustrate the foregoing descrip- 

 tions, and enable the reader to form a more precise 

 and satisfactory opinion respecting the merit of the 

 contrivance. 



Of the Body of the Roaster. 



Although I have directed the body of the roaster to 

 be made cylindrical, it may, without any considerable 

 inconvenience, be constructed of other forms. The 

 reasons why I preferred the cylindrical form to all 

 others were because I was told by workmen that it 

 was the form of easiest construction ; and because I 



