Page 143 - Third Book of Reading Lessons

142 THIRD BOOK OF
But sixty-three unbinds the body's strength, Ere the unwearied mind has run her length : And when om sev'nty, age surveys her last, Tired she stops short-and wishes all were pas
LESSON XV.
GLASS-PUTTY.
HILL.
AL'KALI, n., the ashes of plants; any substance which, when mingled with acid, produces rmentation. F. alkali, om (Ar.) al, and kali, a plant,- om the ashes of which alkaline substances are procured.
INTENSE', a., very great, raised to a high degree. I. and S. intenso, om tendo, L., I stretcl1.
VIT'RIFIED, pt., converted into glass. F. vitr e, om vitrum, L., glass, and eri, to be made.
T&ANSPA'RENT, a., pellucid,-yielding a ee passage to rays of light, so that objects appear through. F. tran.parent. L. tran arens, -trans, through, an paren , p. pt. of parere, to appear.
INcoaao'nrnLE, a., impossible to be consumed or eat n away. F. cor­ roder, to consume or waste away, om rodere, L., to gnaw.
Duo'TILE, a., capable of being drawn out; pliable. F. ductile, om duco, L., I draw.
PLAs1nc, a., capable of being moulded into any rm. I. plastico, om (G.) plasso, or platto, I rm or ame.
ANNEAL (-nele'), v., to heat glass after it is blown, that it may not break; to temper glass or metal. A.S. an lan, om (Go.) el, eld, re.
Fo'LIA, n., lamin or thin plates; leaves. L.folia. lium, L., and
phullon, G., a leaf.
UNc'Tuous, a., clammy, oily. F. onctueux, om unctus, L., anointed.
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1. GLASS is made of sand or int, combined with an alkali, by exposure to intense heat, which causes these substances to melt·and unite. This mixture is said to have been discovered accidentally in Syria, by some merchants who were driven by stress of weather upon its shores. They had lighted a re upon the sands, to cook their od ; the re was made of the plant called kali, which grows on the sea shore;