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Report on Underground Temperature ; — Report on Mathematical Tables ; — Sixth 

 Report on the Thermal Conductivities of certain Rocks; — Report on Observations 

 of Atmospheric Electricity at Madeira; — Report on the Calculation of Tables of the 

 Fundamental Invariants of Alg-ebraic Forms ; — Report on the Calculation of Sun- 

 Heat Coefficients; — Second Report on the Stationary Tides in the English Channel 

 and in the North Sea, Sec. ; — Report on Observations of Luminous Meteors; — Report 

 on the question of Improvements in Astronomical Clocks; — Report of the Committee 

 for improving an Instrument for detecting the presence of Fire-damp in Mines; — 

 Report on the Chemistry of some of the lesser-known Alkaloids, especially Veratria 

 and Bebeerine ; — Seventh Report on the Erratic Blocks of England, Wales, and Ire- 

 land ; — Fifteenth Report on Kent's Cavern ; — Report on certain Caves in Borneo ; — 

 Fifth Report on the Circulation of Underground Waters in the Jurassic, Red Sand- 

 stone, and Permian Formations of England ; — Report on the Tertiary (Miocene) 

 Flora, &c., of the Itasalt of the North of Ireland; — Report on the possibility of 

 Establisliing a ' Close Time ' for the Protection of Indigenous Animals ; — Report on 

 the Marine Zoology of Devon and Cornwall ; — Report on the Occupation of a Table 

 at the Zoological Station at Naples; — Report on Excavations at Portstewart and 

 elsewhere in the North of Ireland ; — Report of the Anthropometric Committee ; — 

 Report on the Investigation of the Natural History of Socotra ; — Report on Instru- 

 ments for measuring the Speed of Ships ; — Third Report on the Datum-level of the 

 Ordnance Survey of Great Britain ; — Second Report on Patent Legislation ; — On 

 Self-acting Intermittent Siphons and the conditions which determine the com- 

 mencement of their Action;— On some further Evidence as to the Range of the 

 Palaeozoic Rocks beneath the South-east of England; — Hydrography, Past and 

 Present. 



Together with the Transactions of the Sections, Prof. Allman's Address, and 

 Recommendations of the Association and its Committees. 



PROCEEDINGS of the FIFTIETH MEETING, at Swansea, August 

 and September 1880, Published at £1 4s. 



Contents : — Report on the Measurement of the Lunar Disturbance of Gravity; — 

 Thirteenth Report on Underground Temperature ; — Report of the Committee for 

 devising and constructing an improved form of High Insulation Key for Electrometer 

 Work ; — Report on Mathematical Tables ; — Report on the Calculation of Tables 

 of the Fundamental Invariants of Algebraic Forms ;— Report on Observations of 

 Luminous Meteors ; — Report on the question of Improvements in Astronomical 

 Clocks I — Report on the commencement of Secular Experiments on the Elasticit}* 

 of Wires ; — Sixteenth and concluding Report on Kent's Cavern ; — Report on the 

 mode of reproduction of certain species of Ichthyosaurus from the Lias of England 

 and Wiirtemburg ; — Report on the Carboniferous Polyzoa ; — Report on the ' Geological 

 Record'; — Sixth Report on the Circulation of the Underground Waters in the 

 Permian, New Red Sandstone, and Jurassic Formations of England, and the Quantitj' 

 and Character of the Water supplied to towns and districts from tliesc formations ; — 

 Second Report on the Tertiary (Miocene) Flora, &c., of the Basalt of the North of 

 Ireland ;^Eighth Report on the Erratic Blocks of England, Wales, and Ireland ; — 

 Report on an Investigation for the purpose of fixing a Standard of White Light ; — 

 Report, of the Anthropometric Committee ;— Report on the Intluence of Bodily Exercise 

 on the Elimination of Nitrogen ; — Second Report on the Marine Zoology of South 

 Devon ;— Report on the Occupation of a Table at the Zoological Station at Naples ; — 

 Report on accessions to our knowledge of the Chiroptera during the past two j'ears 

 (1878-80); — Preliminaiy Report on the accurate measurement of the specific in- 

 ductive capacity of a good Sprengel Vacuum, and the specific resistance of gases at 

 different pressures; — Comparison of Curves of the Declination Magnetographs at 

 Kew, Stonyhurst, Coimbra, Lisbon, Vienna, and St. Petersburg; — First Report on 

 the Caves of the South of Ireland ; — Report on the Investigation of the Natural 

 History of Socotra ; — Report on the German and other systems of teaching the Deaf 

 to speak ; — Report of the Committee for considering whether it is important that 

 H.M. Inspectors of Elementary Schools should be appointed with reference to their 

 ability for examining in the scientific specific subjects of the Code in addition to 

 other matters ; — On the Anthracite Coal and Coalfield of South Wales : — Report on 

 the present state of our knowledge of Crustacea (Part V.) ; — Report on the best means 

 for the Development of Light from Coal-gas of different qualities (Part U.) ; — Report 



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