XX REPORT—1840. 
Greenwich Observations, made as commanded by the British 
Association, by the Rev. T. R. Robinson, D.D. 
On some Experiments on the Electricity of Metallic Veins, 
and the Temperature of Mines, by Robert Were Fox. 
Provisional Report of the Committee of the Medical Section 
of the British Association, appointed to investigate the Com- 
position of Secretions, and the Organs producing them. 
Report from the Committee for inquiring into the Analysis of 
7 Glands, &c. of the Human Body, by G. O. Rees, M.D., 
aG.8. 
Second Report of the London Sub-Committee of the British 
Association Medical Section, on the Motions and Sounds of 
the Heart. 
Report from the Committee for making experiments on the 
Growth of Plants under Glass, and without any free communi- 
cation with the outward air, on the plan of Mr. N. I. Ward, 
of London. 
Report of the Committee on Waves, appointed by the British 
Association at Bristol in 1836, and consisting of Sir John Robi- 
son, K.H., Secretary of the Royal Society of Edinburgh, and 
John Scott Russell, Esq., M.A., F.R.S. Edin. (Reporter). 
On the relative Strength and other mechanical Properties of 
Cast Iron obtained by Hot and Cold Blast, by Eaton Hodgkinson, 
Esq. 
On the Strength and other Properties of Iron obtained from 
the Hot and Cold Blast, by W. Fairbairn, Esq. 
1838. 
Account of a Level Line, measured from the Bristol Channel 
to the English Channel, during the Year 1837-38, by Mr. 
Bunt, under the Direction of a Committee of the British As- 
sociation. Drawn up by the Rev. W. Whewell, F.R.S., one 
of the Committee. 
A Memoir on the Magnetic Isoclinal and Isodynamic Lines 
in the British Islands, from Observations by Professors Hum- 
phrey Lloyd and John Phillips, Robert Were Fox, Esq., Cap- 
tain James Clark Ross, R.N., and Major Edward Sabine, 
R.A., by Major Edward Sabine, R.A., F.R.S. 
First Report on the Determination of the Mean Numerical 
Values of Railway Constants, by Dionysius Lardner, LL.D., 
FE.R.S., &c. 
First Report upon Experiments, instituted at the request of 
the British Association, upon the Action of Sea and River 
Water, whether clear or foul, and at various temperatures, 
upon Cast and Wrought Iron, by Robert Mallet, M.R.I.A., 
Ass. Ins. C.E. 
