Proceedings of the BritisJi Association. 309 



eign scientific memoirs, and the sum of £100 was placed at their 

 disposal ; and at the meeting in 1839, a further sum of £100 was 

 allotted for the same object. The memoirs translated in the first 

 year, under the superintendence of the committee, and at the ex- 

 pense of the Association, were : — 



1. 'Remarks on the advancement of magnetical observatories, and a 

 description of the instruments to be placed in them/ (with one plate) by 

 Weber. 



2. ' Method to be pursued during the magnetical term observations,' by 

 Gauss. 



3. Extract from the daily observations of magnetic declination, during 

 three years at Gottingen, by Gauss. 



4. Description of a small portable apparatus for measuring the abso- 

 lute intensity of terrestrial magnetism, (with one plate) by Weber. 



5. ' On the graphical representation of the magnetic term observa- 

 tions,' (with two plates) by Gauss. 



For the translation and publication of these in Taylor's Scien- 

 tific Memoirs, the first year's grant of £ 100 was paid to Mr. 

 Taylor. In the present year, Ohm's memoir, entitled ' The gal- 

 vanic circuit investigated mathematically,' has been translated at 

 the expense of the Association, and given to Mr. T. for the 7th 

 and 8th Nos. of the Scientific Memoirs. The Association have 

 also paid for seven plates, representing the lines of magnetic de- 

 clination, inclination, and intensity, computed by M. Gauss's the- 

 ory. Translations of the eight memoirs below mentioned, have 

 been gratuitously presented to the committee : — 



1. Gauss 'On a new instrument for the direct observation of the chan- 

 ges of the intensity in the horizontal portion of the terrestrial magnetic 

 force.' 



2. Weber ' On the arrangement and use of the bifilar magnetometer.' 



3. Gauss, ' General theory of terrestrial magnetism.' 

 4- Encke ' On the method of least squares.' 



5. Bessel ' On the determination of the axes of the elliptic spheroid of 

 revolution which most nearly corresponds to the existing measurements of 

 arcs of the meridian.' 



6. Weber, ' Description and use of a transportable magnetometer.' 



7. Bessel ' On the barometrical measurement of heights.' 



8. Rudberg, ' Experiments on the expansion of air.' 



These translations have been placed by the committee, in the 

 hands of Mr. Taylor, by whom they have been printed in the 

 6th, 7th, and 8th Nos. of the Scientific Memoirs. 



Vol. XL, No. 2.— Jan .-March, 1841. 40 



