THE AETIFICIAT. IMiODUClTON OF DIAMOND. G'J 
Several tliousaud experiments have been made and a much greater number of 
analyses, generally following the methods of Moissan and CnooiCES; the more 
important experiments are described at some lengtii, and in most cases are typical of 
groups or repetitions of the same experiment witli small variations. 
The selection lias been cliielly determined by their hearing on tlie general trend of 
the results of our own work and the work of others. 
Those who are familiar with analyses for the detection and isolation of minute 
particles of diamond will know of the tendency of such particles to float, and to 
become lost in the frequent washings. To diminish the risk of arriving at erroneous 
conclusions the analyses of the more important experiments have generally been 
repeated several times. 
Experiments under High. Pressure. 
In the experiments designed to test chemical reactions under high pressure, 
where the charge was heated by passing an electric current through a central 
(fig. 2) small residues of diamond occasionally occurred. A. review of these 
L 2 
core 
