220 Transactions of the Royal Society of South Africa. 
alloy, the latter being easily separated. The black residue left with the 
alloy consisted of carbon — perhaps some hydrocarbon. It ignited readily, 
and in some cases burnt out with a luminous flame. It dissolved with 
the alloy on heating in aqua regia. 
After solution of the crystalline mass and the carbon in aqua regia, 
a small residue was left, consisting of microscopic grains of brown or 
white material. The grains showed brilliant polarisation colours, and 
appeared to consist of silica. Very careful search was made to ascertain 
Fig. 14. Magnification, 20 diameters. 
whether any diamonds were present, but no positive evidence was 
obtained. There were, however, a few transparent particles, more or 
less hexagonal in form, in which a microlith of a pink mineral was found. 
The particle had no influence on polarised hght, but the pink microlith 
had, having an extinction angle of about 15°. 
Chemical Composition. 
Analyses were made {a) upon the meteorite as a whole, {h) upon 
the portion soluble in dilute sulphuric acid, and (c) upon the crystals 
of the alloy. 
(a) Some cuttings weighing about 1 gramme were dissolved in aqua 
regia, evaporated to dryness with sulphuric acid, the ferric salt 
reduced, and the amount of iron found by titration with per- 
