II 



■I- I. 



11 



il 



976 



and Hcobcriiu' ; Seventh Ucport on tlin p]rriitic FJlook.s of Kn^fhuHl, Wiik-s, and Iro. 

 land; — Fifleunth Hoport on Kent's (!avorn ;-Uoport on unrtaiii (,'avos in Itorneo; — 

 Fifth Ueport on tho (.'irciilation of UndurKnuuid Waters in the Jnra'^sic, Red Saml- 

 stone, :i,iid I'lTinian Koimations of Kn^hmd ; — llcporl on tiit! Tertiary (Miommu-) 

 Flora, &c., of the; Masall of tiie N'orth of Irelan<l ;--Uep(irt on tiie possil)iliiy ol 

 Establishing,' a ' (Iloso Time' for the I'njtection of Iii(liL,'eiiuus Animals; ilejiort on 

 tho Marines Zoolo;,'y of Devon and ('ornwall ;— Ileport on tlie ()c('U|)ation of a Tahle 

 at. the Zool((^'i<'al Station a^ Naples; — Ueporl on Kxcavations at I'ortstewart and 

 »'lse\viier(! in the North of Ireland; — Ueport of tlie Anthropometric Committee;— 

 Ucport on the Invest i},'ation of the Natural History of SocL.'a; — lle[)ort on Instni. 

 mentH for measuriiifj tiio Speed of Ships; Tiiird Ueport on tlie Datum-level of the 

 ()rdnanc(! Survey of (Jreat Uritain ; Soconil Ueport on Patent Le^'islation ;— On 

 Self-actiiif^ Intermitt(!nt Sijilions and the eonditions whii'ii determine iIh! com- 

 menc<>ment of tlieir Action;- On some furtiier E\ideiice iiii to tlie Uiinjje of the 

 Palicozoic Uocka beneath the South-east of Knurland ; Hydroj^'raphy, Past and 

 Present, 



Together with the Transactions of tiie Seetions, Prof. Allmuu's Address, and 

 Kccommendations of the ^ ssociation and its Commit tees. 



PROCKEUINGS ok the FIFTIETH MFKTING.at Swansea, August 

 and September 1880, PahJished at il\ 4s. 



Contents : — Ueport on the Measun^ment of the Lunar Disturbance of Gravity;— 

 Thirteenth Report on Undcrf^rround Temperature ; Uejiort of the Committee for 

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

 Work; — Report on Mallipniatieal Tables ;— Ueport on the Calculation of Tables 

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

 Luminous J'eteors; — Ueport on tho (]uestion of Improvements in Astronomical 

 Clocks; — Ueport on the commencement of Secular Experiments on the Elasticity 

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

 mode of rej)ro(luction of certain species of Ichthyosaurus from the Lias of England 

 and Wiirtemburg ;— Uejjort on the Carboniferous Poly/.oa ; — Ueport on the ' Geological 

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

 Permian, New Red Sandstone, and Jurassic Fornuitions of England, and the Quantity 

 and Character of tho Water supplied to towns and districts from those formations;— 

 Second Ueport on the Tertiary (Miocene) Flora, &c., of the IJasalt 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 ; — 

 Ileport of the Anthropometric Committee ; — Report on the Influence of Bodily- Exercise 

 on the Elimination of Nitrogen ; — Second Report on the Marino 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 ycar> 

 (1878-80) ; — Preliminary 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 Det'lination 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 ; — Ileport of the Committee for considering w' her it is important that 

 H.M. Inspectors of Elementary Schools should bc^ ap])oi...ed 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 Coallield 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 II.) ; — Report 

 on Palaeontological and Zoological Researches in Mexico ;— Report on the possibility 

 of establishing a ' Close Time' for Indigenous Animals ; — Report on the present state 

 of our knowledge of Spectrum Analysis; — Ueport on Patent Legislation; — Pre- 

 liminary Report on the present Appropriation of Wages, &c. ; — Ueport on the present 

 state of knowledge of the application of Quadratures and Interpolation to Actual 

 Data ; — The French Deep-sea Exploration in the Bay of Biscay ; — Third Report on 

 the Stationary Tides in the English Channel and in the North Sea, &c. ; — List of 



A. 



