LEAD. BERZELIUS. 85 



To me, Forchhammer represented the highest type of 

 man, as to position and learning; his naming Berzelius in 

 that way, convinced me that he was naming one of the 

 greatest of earth. 



After half a century spent in the study of chemistry, I 

 have more and more realized the truth of the words of my 

 teacher of chemistry. 



F. Other Processes. 



We have considered with a reasonable degree of detail 

 the ignition of the carbonate, the production of the oxide 

 (wet way) and especially the reduction of the oxide in the 

 dry way, all effected by Berzelius. 



This was done, first to become acquainted with this new 

 kind of work, and second, because the record of the great 

 experimental labors of Berzelius forms the basis of our pres- 

 ent investigation, and in truth of all serious work on atomic 

 weights. 



While it would be most interesting as well as highly 

 instructive, to continue our exposition of the experimental 

 data with the same amount of detail, space will not allow us 

 to do so. 



Besides, we can now readily comprehend the data in a 

 compressed, tabular form, followed by a brief mention of 

 the most important points involved. 



In a subsequent part of this book, all the researches 

 made will be given with a sufficient and uniform fullness of 

 detail. 



Referring to that part of this book for such details, we 

 here shall give only the final results of all the researches 

 made on the atomic weight of lead by Berzelius and other 

 chemists. 



In the table now following we have stated all the eleven 

 chemical processes that have been used for the determination 

 of this atomic weight, reserving to each one a single line. 



For each one of these chemical reactions we give first 

 the chemical formula of the two substances weighed, one of 

 which has been converted into the other; second, we give 



