1819.) Scientific Intelligence. 145 
sippi. They will go in a steam-boat now building for the purpose 
at Pittsburg ; and expect to be absent for upwards of three years. 
T. Say, Esq. of Philadelphia, will be one of the party. 
V. Mineralogy in America. 
We observe in the American papers proposals from Dr. J. W. 
Webster for a course of lectures on mmeralogy and geology at 
Boston ; and are happy to observe the science acquired in the 
university of our northern metropolis, during the intervals of 
professional studies, becoming actively employed in a district, 
we apprehend, abounding in minerals in considerable variety. 
VI. Africa. 
Mr.T. E. Bowditch, who has recently published his travels in 
Africa, is about to return to Cape Coast Castle, accompanied by 
Messrs. Williams and Salmon, surgeons. These gentlemen are 
all good naturalists ; and will make frequent excursions into the 
interior with the view of exploring its natural history. 
VII. Temperature of Bombay. 
An account of the state of the barometer and thermometer, 
&e. in this island for 1816 and 1817, was given in the, Annals 
for Sept. last by Mr. Knight. The following additional obser- 
vations recently published, though made long before, may not be 
altogether devoid of interest. 
Mean temperature of the island as estimated from the 
averages of observations made during a period of two years, 
viz. 1803 and 1804. 
Morn. Noon. Night, 
1803.—798° ea eeesee 823° es. e@esecee@ 81° —— 
ay abanccmeabtee pea. ih etiam a RPusbie aie 
Average 79: gp BE 803 48 
General average of 1803. ........ 812° 33 
General average of 1804. ........ 801 3% 
ed 
Mean temperature...... 803 38 
The morning observations were generally made between six 
and eight o’clock, the noon between 12 and 4, and the evening 
between half-past 9 and 12, and the greatest height at noon 
was noted when several observations were made. ‘The thermo- 
meter is stated to have been placed out of the direct influence 
of the sun about 23 feet above the level of high water mark. 
{t appears that the greatest diurnal range of the thermometer 
during the above period varied from 51° to 132°, the least 
diurnal range occurring from April to October, and the greatest 
from November to March. With respect to the above mean 
temperature, the author observes that it is a more favourable 
one than from observations in other parts of India or of the 
world in the same latitude, we should haye been warranted in 
Vou. XIII, N° II, ik 
