OF ARTS AND SCIENCES. 113 



be confirmed by further experiments. The assumed compound would 

 be the second member of a possible series of oxichhn-ides, whose 

 molecules each contain two atoms of chlorine, and of which the com- 

 pound SboOjClj is the first terra. In like manner, SbOCl is the first 

 term of a parallel series, each of whose molecules contain one atom 

 of chlorine, thus : — 



OxiCHLORIDES OF AnTIMONY. 



SbOCl Sbp^Cla 



SbsO.Ci Sb.OjCl^ 



Sb,0,Cl SbgOgCla 



Sb,OioCl SbgOjiCl^ 



This table suggests, not only that there is a possibility of forming 

 other compounds of this class, but also that there may be among 

 them several isomers. On the next page, we give a table wiiicli offers 

 a general review of the crystallographic relations of the more important 

 autimonious compounds. 



Our object in this paper has been to put on record a very consider- 

 able number of new facts ; and if, in presenting them in their philoso- 

 phical relations, we have laid open numerous deficiencies in our 

 knowledge which must be supplied by future investigation, we have 

 only made evident, in the case of antimony, what is equally true of 

 our knowledge of the chemical relations of many other equally com- 

 mon elementary substances. Some of these deficiencies we hope to 

 be able to supply ourselves in future papers. 



We would again express our obligations to the same gentlemen 

 named at the close of the previous paper, for the assistance they have 

 rendered in this portion of the investigation also. We are especially 

 indebted to Dr. Gooch, for his aid in the crystallographic measure- 

 ments ; and to Mr. Oliver W. Huntington, for the drawings with which 

 the paper is illustrated. 



VOL. XIII. (n. s. v.) 



