44 



CUP, MODEL OF 1908, 

 (Plate XV.) 



The parts are— 



1 body. 



1 handle. 



1 upper insulator, 



1 lower insulator. 

 The body is made from sheet aluminum 0,04 inch thick and drawn 

 by two operations into a cup 4.8 inches in diameter and 2^ inches 

 deep. The top of the cup is rolled to form a strong, stiff rim. 



The handle is made from same material as the body and is com- 

 pleted in six operations. It is stamped with the letters ''U. S," 

 and "R. I. A," and year of manufacture. The edges are folded for 

 stiffness and a slot is punched to receive the tines of a fork for 

 handling cup over a fire. It is separated by fiber board insulators 

 0,05 inch thick from the body, to which it is fastened by three 

 aluminum rivets of 0.15 inch diameter. 



CUP, MODEL OF 1906. 

 (Plate XV.) 



The parts are — 



1 body, 



1 handle. 



1 upper insulator. 



1 lower insulator. 

 The body is made from sheet aluminum 0.04 inch tliick and drawn 

 by three operations into a cup 4 inches in diameter by 4.13 inches 

 deep. The top of the cup is rolled to form a strong, stiff* rim. 



The handle is made from decarbonized sheet steel 0.022 inch thick 

 in three operations. It is stamped with the letters ''U, S." and 

 "R. I. A." and year of manufacture, the edges folded for stiffness, 

 and a slot punched to receive the tines of a fork for handling cup, 

 after which it is aluminized. It is separated by fiber board insula- 

 tors 0,05 inch thick from the body, to which it is fastened by tliree 

 aluminum rivets of 0.15 inch diameter, 



KNIFE. 



(Plate XV,) 



The knife blade, blanked from special double-bevel cutlery steel, 

 is straightened and tempered. The aluminum handles are then cast 

 on, after wliich the blades are ground, polished, and tinned, the 

 handles finally being stamped with the letters "U. S." and "li, I, A." 

 and year of manufacture. 



