December 5, 1902.] 



SCIENCE. 



919 



chemical laboratory of the University of Mich- 

 igan, November 7, the following papers were 

 read : ' A Rapid and Accurate Method for the 

 Determination of Sulphur in Coal,' by Mr. 

 C. Sundstrom ; ' Non-uniformity in Portland 

 Cements ' ; ' Causes and Remedies,' by Mr. O. 

 Button, of the Hecla Portland Cement Com- 

 pany. 



The 228th meeting of the New York Elec- 

 trical Society was held in the lecture room of 

 the American Institute on November 25, when 

 Mr. A. Frederick Collins lectured on ' Opera- 

 tive Systems of Wireless Telegraphy.' 



The American Electrochemical Society will 

 hold the annual meeting of the society in New 

 York on Thursday, Friday and Saturday of 

 the week following Easter Sunday. A com- 

 mittee was appointed to arrange with the 

 American Institute of Electrical Engineers for 

 a contemporary meeting to be held in Septem- 

 ber at Sault Ste. Marie. 



An International Exposition of Hygiene will 

 be held at Buenos Ayres in connection with 

 the second Latin-American Medical Congress, 

 which will hold its sessions in April, 1904. 

 An invitation is extended to public and private 

 institutions interested in the subject to partic- 

 ipate in the exposition. Reduced rates for the 

 transportation of exhibits have already been 

 obtained from several steamship companies. 



A SUMMARY of the progress of the Geological 

 Survey of the United Kingdom and Museum 

 of Practical Geology for 1901 has been is- 

 sued by the Board of Agriculture. According 

 to the abstract in the London Times it gives 

 a full account of the field work of the Geo- 

 logical Survey throughout the year and of the 

 chemical, petrological and paleontological 

 work in connection therewith. In the west 

 of England the process of subdividing the 

 great killas-formation of De la Becha has 

 been continued, and a new division — the Hayle 

 sandstone — has been recognized. A consider- 

 able mass of granite, later in date than the 

 main mass, has been found in the Land's End 

 district, thus proving that the granitic area 

 is not so simple in structure as is represented 

 in the earlier maps. Special attention has 

 been paid to the metamorphism produced by 



the granite, not only on account of its scientific 

 interest, but also because the more important 

 mineral veins occur in the metamorphic zone. 

 In the 'Devonian and Carboniferous areas of 

 the west of England additional evidence has 

 been obtained of an important unconformity 

 between the middle culm or wearde beds and 

 the Devonian. In the South Wales area the 

 detailed examination of the coalfield has pro- 

 ceeded as far west as Swansea, and some new 

 inliers of Silurian rocks have been detected in 

 Gower. The resurvey of the Midland coal- 

 fields has been continued. In the northern 

 district of Scotland work has been carried on 

 in Ross-shire and Inverness-shire, extending 

 eastwards from Loch Hourn and Loch Ailsh. 

 Much additional information has been ob- 

 tained as to the crystalline schists and the 

 associated igneous rocks. Cretaceous rocks 

 have for the first time been noticed in Soay 

 Sound and Scalpay in the Skye district, and 

 an interesting series of composite dykes of 

 Tertiary age has been found in the Lome 

 plateau. The detailed mapping of the drifts 

 in Ireland was begun in the Dublin area. 

 Two points are cited as being worthy of 

 special mention. The esker-like ridge south 

 of the Liffey has been found at one point to 

 rest on a water-worn fioor of carboniferous 

 limestone. At the same locality the gravels 

 of the ridge can be seen to pass laterally into 

 gravelly clay, full of scratched stones, resting 

 on a striated rock surface. These facts 

 strongly support the widely accepted view that 

 ridges of this type are the casts of sub-glacial 

 water-channels. Analyses of South Wales 

 coals have been begun, and some notes on 

 weathering of magnesian limestones are pub- 

 lished. 



The U. S. Department of Agriculture has 

 received through the Department of State 

 notice that a general exposition of hygienic 

 milk supply will be held at Hamburg from 

 May 2 to May 10, 1903. The exposition will 

 embrace eight sections as follows : 



Section A. — For milk -production : { 1 ) Exhibit 

 of limited number of milch cows of known race; 

 (2) stable fittings and implements; (3) regimen 

 and hygienic food; (4) technics of milk, tests, 

 and execution of; (5) management of milk in 



