40 REPORT—1845. 
ing gentlemen attended the proposed Conference, which was held at Cam- 
bridge in the week terminating on the 25th of June, viz.— 
M. Kupffer, Director-General of the Magnetic Observatories of the Em- 
pire of Russia. 
M. Kreil, Director of the Meteorological and Magnetic Observatory at 
Prague. 
Baron von Senftenberg, Founder of the Astronomical, Magnetic and 
Meteorological Observatory at Senftenberg in Bohemia. : 
Dr. Adolphe Erman, Professor of Physics in the University of Berlin, 
and author of a work entitled ‘ Reise um die Erde in den Jahren 
1828 bis 1830. Physikalische Beobachtungen.’ 
Herr Dove, Professor of Physics in the University of Berlin, author of 
a work entitled ‘ Ueber die nicht periodischen Verander ungen der 
Temperatur Vertheilung auf die Oberflache der Erde.” 
Dr. von Boguslawski, Conservator of the Royal Observatory at Breslau, 
and Professor of Astronomy of that University. 
The Conference was also attended by the Baron von Waltershausen, a gen- 
tleman who has taken part in the magnetic observations of Messrs. Gauss and 
Weber at Gottingen, and executed a magnetic survey of portions of Italy 
and Sicily. ar ranidg 
In addition to these gentlemen and to a Committee consisting of Sir John 
Herschel, Bart., the Very Rev. the Dean of Ely, Dr. Lloyd, Dr, Whewell, 
Lieutenant-Colonel Sabine, and the Astronomer Royal, the following gentle- 
men, eminent as magnetists or meteorologists, were also requested especially 
to attend the meetings of the Conference, viz.— 
J. Phillips, Esq., author of several works on magnetism and mete- 
orology. 
Sir Thomas Macdougall Brisbane, Bart., P.R.S. Edin. 
J. A. Broun, Esq., Director of Sir T. Brisbane’s Magnetic and Mete- 
.  orological Observatory at Makerstown. 
J. D. Forbes, Esq., Professor of Natural Philosophy at Edinburgh. 
Capt. Sir James C. Ross, R.N. 
The Rev. Dr. Scoresby, author of several well-known publications on 
_ Magnetism. 
A. Lawson, Esq., Founder of a Meteorological Observatory at Bath. 
Lieut. Riddell, R.A., Assistant-Superintendent of Ordnance Magnetic 
Observatories. 
W. Snow Harris, Esq., author of several well-known publications on 
meteorology. 
The Conference was also attended by the Marquis of Northampton, Pre- 
sident of the Royal Society, and by Colonel Sykes, one of the Directors of 
the Hon. East India Company. 
And to secure at once the due publicity for its discussions by the attendance 
of persons whose opinions are entitled to weight, but who might be acci- 
dentaily omitted in the above list, and an impartial judgement by that body 
on whose recorded judgement the British Association is accustomed to rely 
in matters of scientific importance, every member of the Committee of Re- 
commendations of that Association was requested to attend the meetings of 
the Conference, which were held at Cambridge on the 20th, 21st, 23rd, 24th, 
and 25th of June, and in which every part of the subject underwent discus- 
sion upon a plan previously arranged and placed in the hands of all present, 
in the report drawn up for that purpose by the Magnetic Committee. 
In these meetings the following opinions of the Conference were recorded, | 
