Faraday lecture. The fundamental properties of the elements

Theodore William Richards
1911 Journal of the Chemical Society Transactions  
also Richards and Parker, ibid., 1897, 13, 86. The form of apparatus shown in this diagram is slightly different from t h e original arrangement, althongh the main idca is the saxtie. The flat ground joint between quartz and glass allows for their different coefficients of expansion, and makes a quartz tube iiiterchangeahle with any other, in case of breakage.
doi:10.1039/ct9119901201 fatcat:kh2f2cnwrnhytaapw2mpoyere4