170 Analisis of Scientific Books. 
14. On the anomalous Magnetic Action of Hot [ron between the 
White and Blood-red Heat. By Peter Barlow, Esq., of the 
Royal Military Academy. Communicated by Major Thomas 
Colby, of the Royal Engineers, F.R.S. 
Inconducting some experiments upon the influence of high tem- 
peratures upon the magnetism of different kinds of iron and steel, 
Mr. Barlow observed the following very singular circumstance. 
Between the white heat of the metal, when all magnetic action was lost, 
and the blood-red heat, at which it was the strongest, there was an inter- 
mediate state in which the iron attracted the needle the contrary way to 
what it did when it was cold, viz., if the bar and compass were so situated 
that the north end of the needle was drawn towards it when cold, the south 
end was attracted during the interval above alluded to, or while the iron 
was passing through the shades of colour denoted by the workmen the 
bright red and red heat. 
The author enters into a detail of his experiments connected 
with, and in illustration of, this anomalous action; and observes, 
that the only probable explanation of it which he can offer is, 
that the iron cooling faster towards its extremities than towards its centre, 
a part of the bar will become magnetic before tle other part, and thereby 
cause a different species of attraction; but I must acknowledge, that this 
will not satisfactorily explain all the observed phenomena. ‘The results, 
however, are stated precisely as they were noted during the experiments, 
and others more competent than myself will probably be able to deduce 
the theory of them. 
15. Observations for ascertaining the Length of the Pendulum 
(vibrating seconds) at Madras in the East Indies, with the 
Conclusions drawn from the same. By John Goldingham, 
Esq., F.R.S. 
The observations, the results of which are detailed in this _ 
paper, were made upon the same plan, and with a similar ap- 
paratus to those formerly published in the Philosophical Trans- 
actions by Captain Kater. The mean length of the pendulum 
vibrating seconds, thus established at Madras, in latitude 
13° 4’ 9”.1 north, at the level of the sea in vacuo, and ata 
temperature of 70° of Farenheit, is 39.026302 inches of Sir 
George Shuckburgh’s scale. 
16. Account of an assemblage of Fossil Teeth and Bones of 
Elephant, Rhinoceros, Hippopotamus, Bear, Tiger, and Hyena, 
and sixteen other animals ; discovered in a cave at Kirkdale, 
Yorkshire, in the year 1821: with a comparative view of five 
similar caverns in various parts of England, and others on the 
Continent. By the Rev. William Buckland, F PESO BLS: 
Vice President of the Geological Society of London, and 
Professor of Mineralogy and Geology in the University of 
Oxford, &c. §c. Sc. 
In this long but entertaining paper, Mr. Buckland gives an 
account of the geological position and relations of the rock in 
