MISCELLANEOUS INSTRUMENTS. 



Fig. 761. 



Numeral Frame (Fig. 761) consists of a strong frame with 

 a handle, having twelve wires passing through the frame, 

 on each of which are twelve balls, a black and a yellow 

 one alternately ; designed to give children a distinct idea of 

 numbers and their combination. 



Price, with 144 balls, 88 cts. 



Geometrical Solids. (Figs. 762 to 773, next page.) This 

 apparatus consists of a set of twelve solids by which the 

 fundamental principles of geometry may be illustrated ; im- 

 portant in the course of education for giving a clear idea of 

 the science. They consist of 1, a cylinder; 2, oblique 

 cylinder ; 3, triangular prism ; 4, six sided prism ; 5, sphere ; 

 6, oblate spheroid ; 7, prolate spheroid ; 8, hemisphere ; 9, 

 cone; 10, pyramid; 11, frustum of a cone; 12, frustum of 

 a pyramid. Price, the set, $1.25. 



