Matter — a Mode of Motion. 147 



ihe kind are to be found in the numerous treatises on the 

 metallurgical use of the blowpipe. 



By the purely mechanical treatment, the miner would 

 ascertain whether the sample tried was auriferous oi* not, and 

 even without attempting to weigh the separated gold, he 

 would be able to draw valuable conclusions from its aspect 

 in the mortar, concerning the comparative richness of the 

 stone. 



Art. XLVIII. — On an Easy and Expeditious Metliod of 

 verifying a Ship's Position on a Coast ivlien only 

 one Object on Shore can he seen either in the Day or 

 Night, by the use of Perry's Anti-Collision Dial. 



By C. J. Perry. 



[Read Uth October, 1871.] 



Art. XLIX. — On the Treatment of Criminals in Relation 

 to Science. 



By H. K. Rusden. 



[Read 11th November, 1872.] 



Art. L. — On a Kaleidograph. 

 By M. 0. Pritchard. 



[Read 11th November, 1873.] 



Art. LI. — On Matter — a Mode of Motion. 

 By Farie MacGeorge, Esq. 



[Read 11th November, 1872.] 

 L 2 



