No. 112.] 825 



sents the most delicate and diversified coloring ; although com- 

 bined in the eruption from the furnace ^vith extraneous properties. 

 Thus beautiful in its crude and adulterated conditioujmay not this 

 substance, purified and refined by science, be rendered subservi- 

 ent to the arts ? Impressed with this conception, I immediately 

 called the attention of Prof. Salisbury to the subject. The follow- 

 insf analyses furnish the result of his examinatiun : 

 100 parts of dry glass gave of 



Reddisli Light 



purple. blue. 



Silica, 68.85 68.55 



Manganese, 8.05 9.14 



Iron, 4.15 3.91 



Cobalt, trace 0.05 



Arsenic, ....... trace 0.12 



Lime, .; 17.50 17.11 



Magnesia, 0.15 0.12 



Potassa, 0.85 0.43 



■ Soda, 0.35 0.22 



99.90 99.65 



" In the reddish purple glass, the coloring matter is principally 

 manganese and iron. In the light blue variety, manganese, iron, 

 cobalt and arsenic. Cobalt communicates to it the blue tinge, 

 and arsenic the milky white color." In a subsequent notice he 

 suggests that this slag may be favorably used in the manufacture 

 of colored bottles and other ornamental glass fabrics. A distin- 

 guislied friend to agriculture and the arts,^ imagined that this 



• The late John DclaOeld, E.sq. The first proof sheet of this report ^ras Buhmittod to the 

 rcvisal of Mr. DclaCeld, but long before the page was in press that oontaina the above allu- 

 lion, he had been summoned, suddenly and in an unexpected hour, from the theater of his 

 patriotic labors. I cannot allow the occasion to pa^s, without acknowledging the deep debt of 

 gratitude I owed him, for the sympathy, the zeal and interest he manifested as chairman "on 

 the Escex County Survey," and for tho countenance and aid ho extended to rac in my arduous 

 duties. Ili.s enthusiasm always anient and zealous, in tho promotion of every patriotic object, 

 ■was strongly excited by tho revelations exhibited in the progrcEs of the surrey of the vastre- 

 Bourees and capabilities of that county, which had been littlo appreciated by even hie inrcsti- 

 gating mind. 



He h:ui just entered on the threshold of a career, which promise^ iruiUtn lo ihc hui cs and 

 efforts of uuiny years. rrovidcncc,"^ho.so inscrut«blo di.xpcnsation has removed hiin, at tho 

 period of his highest usefulness, can alone supply the void his death has created to the cau?e of 

 Agriculture and practical science. Tbi.«, however, is not tho appropriate place to record the 

 tribute due to his eminent worth and didtinguishod services. 



