Gas Illumination. 385 
seventeen colonies on the western coast. The interior is 
not habitable owing to accumulations of ice. The popu- 
lation has increased seven hundred and fourteen since the 
year 1789.—Ibid. 
47. Mildew. 
been complete- 
ly verified. Its operation is so quick, that in forty eight 
hours, the vestiges of the disease are hardly discernible. 
48. Theory of Electricity. 
A paper was read by Dr. Van Marum, at the Royal In- 
stitution of the Sciences at Amsterdam in 1819, the reason- 
ing of which goes far to prove that the Franklinian hypoth- 
theory of Du Fay, of vitreous and resinous fluids principally 
supported by the French philosophers, does not so well ex~ 
plain the phenomena. The paper of Van Marum is pub- 
Hshed in Thomson’s Annals, December 1820. 
49. Gas illumination, 
™ b4 
sash 
#: f 
es ad 
Has been introduced into one of the districts of Paris 
with the best effects, under the judicious direction of 
Deak ae Satta seve 
- a z 
* 6 Fin pe. 
ee 
ings 
