lv CONTENTS. 
On the advantageous use made of the gaseous escape from the Blast 
Furnaces at the Ystalyfera Iron Works. By JAmEs PALMER Bupp 
Report of progress in the investigation of the Action of Carbonic Acid 
on the Growth of Plants allied to those of the Coal Formations. By 
URI PAUINT yecsy hes aint soe VadbaQidd Sp ve cchiceed teva sonennkeidaeet ened nails 
Supplement to the Temperature Tables printed in the Report of the 
British Association for 1847. By Professor H. W. Dove, Cor. Memb. 
of the British Association ; containing 84 additional Stations ......... 
Remarks by Professor Dove on his recently constructed Maps of the 
Monthly Isothermal Lines of the Globe, and on some of the principal 
Conclusions in regard to Climatology deducible from them; with an 
introductory Notice by Lieut.-Col. Epn>wakp Sazine, Gen. See....... 
On the Progress of the investigation on the Influence of Carbonic Acid 
on the Growth of Ferns. By Dr. DAUBENY..........2.scessesercceceaes 
Notice of further progress in Anemometrical Researches. By Joun 
[PPEETON; NM Ads give ceehe ccc seqcstpee vedesssosiovssttnde sss sodenhindwe Se - eae 
To the Assistant-General Secretary 
Second Report on the Gaussian Constants. By ApoLpHE ERMAN 
eeeeee 
Report relative to the expediency of recommending the continuance of 
the Toronto Magnetical and Meteorological Observatory until De- 
cember 1850, adopted by a Committee of the British Association at 
Swansea, August 1848, consisting of the following Members :—Lord 
Wrortestey, Chairman, the Dean of Ety, Rev. Dr. Lioyp, Pre- 
sident of the Royal Irish Academy, and Lieut.-Col. SABINE 
eee neeres 
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