of Chemical Equivalents. 13 
94,9 divided by 2, gives 47,45 for the equivalent of dry oxalic 
acid. I therefore again adopt the result of the very indus- 
trious and ever accurate Berzelius, obtained by means of 
oxalate of lead, that 296,6* litharge are combined with 100 
oxalic acid, which are in the proportion of 139,5 litharge to 
47,0 oxalic acid. Such a degree of accordance between me- 
thods totally different appears highly satisfactory, and seems 
to shew that in attempts to determine the same point by means 
of lime, some compounds may possibly be formed at the same 
time differing in the proportions of acid and base, as in the 
cases of oxalate and bin-oxalate of strontia, observed by Dr. 
Thomson, and that erroneous inferences may have been drawn 
from precipitates in which they are blended. 
With the exception of those instances that I haVe enume- 
rated, there are few in which I have found it necessary to 
make any new experiments, as I have met with coincidences 
between the independent results of others sufficient to satisfy 
me of their correctness ; and accordingly I have adopted such 
determinations without any pretensions to improve upon them 
by new experiments of my own. 
It is not my design in the table which follows this paper, to 
attempt a complete enumeration of all those elements or com- 
pounds which I suppose to be well ascertained, but merely 
to include some of those which most frequently occur. I do 
not offer it as an attempt to correct the estimates that have 
been formed by others, but as a method in which their results 
may be advantageously applied in forming an easy approxi- 
mation to any object of our inquiries. 
The means by which this is effected may be in part under- 
stood by inspection of the Plate I., in which will be seen the 
* Ann. de Chimie, No, 243. 
