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works six or eight years ago, since which period more 
attention had been paid to it, and it had been found in 
many instances. The subject required a more thorough 
elucidation than he was able to bring to bear upon it; 
and he could only add, that the crystals of Titanium 
found in the works he alluded to, appeared to him to 
be produced to a greater extent in those furnaces into 
which large quantities of cold water had been introduced, 
while the materials in the hearth were very hot, for the pur- 
pose of more expeditiously cooling them : this was, however, 
contrary to the opinion of many scientific men, who thought 
they were formed by very slow cooling. The experiments 
which he^had made, rather led him to suppose that this crys- 
talization was caused by rapid cooling. The large specimen 
he now presented, which was a very rare one, only exhibited 
the cubes of Titanium, and the crystals of iron in contact 
with that metal were in beautiful parallelism, and much re- 
sembled those of moss. He might remark that he had never 
found such crystals except in contact with Titanium. 
The Chairman supposed that, with regard to the hearth, 
Mr. Hartop meant that part which was outside the furnace ? 
Mr. Hartop replied, it was that part into which the iron 
fell, after being smelted from the ore, before it ran out. He 
was not aware of the relative specific gravity between iron 
and Titanium, but should think the latter the greater of the 
two, from the situation they are found in in the furnace 
hearth. He thought that the beautiful crystals he had 
described could not be formed at the time the iron was. 
The Chairman remarked that they might be derived from 
oxygen or hydrogen. 
Mr. Hartop said, he had a specimen of the ore of Tita- 
nium, from Cornwall, in which one beautiful cube might be 
seen. 
Mr. Leah differed with Mr. Hartop in the conclusions he 
