312 Hare’s Gasometer. 
tion should almost lead one to imagine, that if mankind were 
all produced from one and the same stock,the black skins of 
the Ethiopians, &c. might possibly be owing can to 
some such accidental cause.”—-See Edwards’ Plate 2 
MECH ANICS AND THE ARTS—PHYSICS AND 
CHEMISTRY. 
mtr 
Arr. 1X.— Account of an improved mode of suspending — 
Hanre.* 
Gasometers ; by Dr. 
It is well known to all who are conversant in gas light ap- 
paratus, that no mode has been heretofore devised to render 
Gasometers accurately equiponderant at all points of their 
immersion in the water ; a Circumstance so indispensable to 
eir action. 
or | se ie adop- 
a. ted in the English BA a 
t in the annexed cut, 
has in practice been found 
Lo pe rare Boies: once executed, it requires no 
further attention. The rationale of the operation of sucha 
beam, will be evident from the m ethod of constructing one 
which I shall proceed to explain. 
weight of the Gasometer when sunk so low, as that the top 
will 
In the same way find the weight of the Gasometer at. 
highest point of emersion, to which it is to rise, when i in a 
Then, as the weight in the last case, is to the weight in the 
* Published first in the Analectic Magazine for May, 1817. 
Find othe trial, if possible ; if not, by calculation,) the. 
be as near as possible to the water, without touching ! i 
