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Cause of Weakness in the St. Gothard Tunnel.--Investigations have been made of tile cause of weakness in the parts of the St. Gothard tunnel where the vaults were crushed, and it is thought that the accident must be attributed to the action of damp air upon the schists and gneiss, and to the decomposition which resulted therefrom ; the presence of anhydrous sulphate of lime, or karstenite, was also an important agency; its transformation into gypsum is followed by a disaggregation which renders the rock incapable of sustaining its pressure. Other hypotheses have been framed, but M. Loustan considers this as the most plausible.--C.
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## 229 On motion, the nominations were kept open until the next meeting. At the suggestion of Mr. Coleman Sellers, who was unable to be present at this meeting, the Secretary offered the following resolution, which was unanimously adopted. Resolved, That the Secretary of the Franklin Institute be
Circulation of Air in the St
Bone Glass.--Afier extracting phosphorus from bones, a glass can be fi)rmed fi'om the residue, which consists of lime and.phosphoric acid ; the ordinary'kinds of/lass being composed of sand and potash, soda, lime and alumina. Bone ~'lass ran be worked as readily as any other/l'~ss. It /ms the vahmbl
The difference between maximal and minimal distance covered (the distance between the trapezium ridge and hamate hook; moment exerted on structures: I Nm) by an intact flexor retinaculum (FR, minimum, 3.3 2 0.1 cm; maximum, 3.7 2 0.2 cm) and the increase in the maximal distance on carpal tunnel rele