By John Sharp
A set of paper sliceform types made of intersecting units of parallel planes which slot jointly to generate attention-grabbing three-d surfaces. The ebook includes a assorted collection of types to chop out and make, and an evidence of ways they have been produced.
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Additional info for Sliceforms: Mathematical Models from Paper Sections
Ancient lamps have a small reservoir for the oil and a lip into which the wick was placed. Some were made of hard precious stone, such as quartz, serpentine, and lapis lazuli, suggesting that the candle’s use was highly regarded. Rushes, which could be found in abundance, could be peeled of their outer bark. The inside pith is a soft and absorbent fibrous material from which an excellent wick can be obtained. ) The technique involved peeling the rush while leaving a strip of the outer bark attached so it would stand upright.
They also make candles from bayberry wax. In Syracuse’s large Merchandise Mart, there are fascinating displays of candles in a stunning variety of shapes, sizes, and colors. In the Chicago region, there are two small candle plants that make candles for religious purposes only. By canon law candles used in certain rituals of the Roman Catholic Church must contain not less than 51 percent beeswax; some must be 100 percent beeswax. Those for Greek Orthodox Churches are composed entirely of paraffin.
Although in the fresh state it is black and has an unpleasant odor, after exposure to sun and sea and air, it is transformed to a pleasant-smelling mass, yellow or gray in color. One wonders who discovered its properties for use in fragrances! The First Commercial Spermaceti Factory Obediah Brown, of the entrepreneurial family of Rhode Island Browns, opened the first spermaceti candle works in 1753. That year alone his company made three hundred barrels of spermaceti candles. Brown and his brother Nicolas became the moving force behind the United Company of Spermaceti Candlers, which was responsible for parceling out the supply of spermaceti oil, which was limited despite the avaricious whaling industry’s most stringent efforts.