| 单词 | alum powder | 
| 释义 | > as lemmasalum powder  a.   General attributive, as  alum crystal,  alum house,  alum powder,  alum salt, etc. ΚΠ 1568    Edinb. Test. I. f. 119v, in  Dict. Older Sc. Tongue at Alom, Allom, Allum  				Ane puncheoun of alome bark. 1622    M. Drayton 2nd Pt. Poly-olbion xxviii. 146  				Her earth with Allome veines so richly intermin'd. 1673    J. Ray Coll. Eng. Words 139  				The Liquor..is conveyed to the Allom-house. 1732    T. Short Proposals for printing Hist. Mineral Waters  ii. 171  				The Crystals procured from the purple-colouring Salt in our Petrefactions, are dissolvable in about seven or eight times their Weight of Water, but Alum Crystals in not less than fourteen times their Quantity. 1830    G. Colman Random Rec. I. vi. 187  				Most readers will pardon me for not taking them into the Alum-House, to explain the several methods of crystallization, &c. 1906    Amer. Naturalist 40 158  				An alum crystal whose bearing surface was only a small fraction of a square centimeter. 1969    B. Ryan Your Child & First Year of School iii. 56  				Play dough, if it is made from scratch from salt, flour, water, and perhaps a little alum powder as a preservative, gives an even broader experience of chemistry. 1991    C. Hill Tack 10  				Partially vegetable tanned, the leather is then finished with a soaking in alum salts. 2001    O. Sacks Uncle Tungsten vii. 68  				If I used an alum solution and a good seed crystal to start it off..the crystal would grow evenly. < as lemmas | 
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