Memorial on the upward forces of Fluids. 11} 
described! It is, however, ascertained, that human beings can 
transport themselves into high regions, and through immense 
space, with the rapidity of tempestuous wind.* Others have 
been raised to the height of 3670 toises, equal to that of 
Mont Blanc, and experienced the same effects as are observ- 
first, connected the balloon with a parachute, in the form of 
two wings, which he could really agitate, and was truly a se- 
cond Icarus, d fe te th the first auli his 
balloon like a fish of 90 feet long, with fins of 30 feet, and a 
tail, or rudder of 15 feet ; but it could not be adopted, owing 
to the enormous expense, (about 60,000 dollars.) Mr. Rob- 
ertson has performed fifty-five aerial voyages, and has invented 
a double parachute. He has also instructed his son Eugene, 
who is now in New-York, and their united labours have pro- 
duced the design called the Minerva, a vessel of 70 tons, car- 
rying sixty men, which, after striking the shortest line to the 
ocean, can ly committed to the waves! Proposals on 
this subject have been addressed to all the academies of the 
world, in the expectation that an encouraging subscription 
might be opened for the ultimate execution of the plan; but 
we have not heard that any further progress has’ made. 
experiments, and others of inferior magnitude, have, 
as far as we know, added no new means of safety to zrosta- 
tion, nor the least power to regulate and direct the march of 
an etherial expedition to favour either science or human indus- 
* Sixty miles an, hour, according to Hutton. 
