II. On underground temperatures, with observations on the conductivity of rocks, on the thermal effects of saturation and imbibition, and on a special source of heat in mountain ranges
{"title":"II. On underground temperatures, with observations on the conductivity of rocks, on the thermal effects of saturation and imbibition, and on a special source of heat in mountain ranges","authors":"J. Prestwich","doi":"10.1098/rspl.1884.0079","DOIUrl":null,"url":null,"abstract":"Having filled a fresh, tube w ith fresh spun glass, I carefully exhausted w ith th e Sprengel pum p on January 24th, and the exhaustion was kep t up till February 5th, th a t is, fo r twelve days. During th is tim e I frequently tested w ith th e McLeod gauge. A very i slight increase of pressure was found during th a t in te rv a l; bu t it was iso slight th a t I am not able to say th a t i t was g reater th an th a t <which is observed a t all times, even w ith the Sprengel pum p in excellent order, w hen a vacuum is m aintained for several days. On F ebruary 5th, I passed th ree or four bottlesful of m ercury through the pum p, and had a vacuum of about 0*5 M as shown by the McLeod gauge. I then applied heat, and had in stan tly an abun dance of gas given off from th e spun glass. This was collected as before, and analysed. The num ber of glass fibres was 15,500, giving an estim ated surface area of 3527 sq. centim s. The am ount of gas given off was 0'41 c .c .; which is considerably less in proportion th a n in my first experim ent. Of th is gas i t was found th a t 78'6 per cent, was carbonic acid gas (absorbable by caustic potash). Of th e rem ainder 10‘5 per cent, was oxygen (absorbed by pyrogallic acid and potash) ; while 89‘5 per cent, was left unab so rb ed ; and m ay be supposed to be m ainly nitrogen. The very large proportion of carbonic acid gas is rem arkable, and i t is difficult to account for, unless we m ay suppose th a t it was taken up by the glass in large quan tity d u rin g the operations of drawing out the glass in to fibres, and enclosing i t in th e contain ing tube—operations during which there was, in these prelim inary experi ments, an abundant supply from the blowpipe flames. 1885.] Underground Tem,fyc.","PeriodicalId":20661,"journal":{"name":"Proceedings of the Royal Society of London","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1098/rspl.1884.0079","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Royal Society of London","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1098/rspl.1884.0079","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Having filled a fresh, tube w ith fresh spun glass, I carefully exhausted w ith th e Sprengel pum p on January 24th, and the exhaustion was kep t up till February 5th, th a t is, fo r twelve days. During th is tim e I frequently tested w ith th e McLeod gauge. A very i slight increase of pressure was found during th a t in te rv a l; bu t it was iso slight th a t I am not able to say th a t i t was g reater th an th a t
1月24日，我用崭新的纺纱玻璃填充了一个新管子，然后小心翼翼地用斯普伦格尔泵把它抽干，一直抽到2月5日，也就是最后一天，抽了12天。在这段时间里，我经常用麦克劳德量表进行测试。在这段时间内，压力有非常轻微的增加;但它非常小，以至于我不能说它比我们一直观察到的，甚至在斯普伦格尔泵井然有序的情况下，在真空中保持几天的情况下，它都要大。2月5日，我将三、四瓶汞通过泵浦，从麦克劳德表可以看出，真空度约为0*5 m。然后我加热，从纺丝的玻璃中冒出了大量的气体。像以前一样收集并分析了这些数据。玻璃纤维的数量为15,500，估计表面积为3527平方米。释出的气体总量为0.41℃;在我的第一个实验中，这个比例要小得多。在这些气体中，发现有78.6%是碳酸气体(可被苛性钾吸收)。低于10.5%的是氧气(被焦性没食子酸和钾肥吸收);而89.5 %的人则没有得到任何回报。m可能主要是氮。很大比例的碳酸气体rem arkable,我很难解释,除非我们m ay假设th t在大型全被玻璃tity d u rin g操作画出玻璃纤维,并附上我在th e t包含ing tube-operations期间,在这些预备考试inary试验的力量,充足的供应从吹管火焰。1885.[英语单词地下名词
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