COMBINATIONS. 



337 



only, as chlorine; some with two atoms of hydrogen, as oxygen, sulphur, etc., 

 and some with three, as nitrogen and phosphorus ; some again with four, as 

 carbon and silicon. It has been impossible in the pages we have been able 

 to devote to the Metalloids to do more than mention each briefly and incom- 



'g. 39-1- The manufacture of porcelain in China. 



pletely, but the student will find sufficient, we trust, to interest him, and t 

 induce him to search farther, while the general reader will have gatheret. 

 some few facts to add to his store of interesting knowledge. We now pas- 

 on to the Metals. 



Fig. 395. Experiment showing affinity between arsenic and chlorine. 



