128 MUSEUM METEORITES—HONEYMAN, 
derived from a mass profound and pre-existent: e.g., Nova 
Scotian Basalts already referred to. 
“There are other pyroxenic rocks where peridot abounds, e. g., 
in the dolerites of Montarville and Montreal, Canada. M. Hoch- 
stetter has recently recognized it in considerable mass and called 
it “ Dunite.” Note—We would add the Peridotie rocks in the 
diamond mines of South Africa. 
“Transformation of Serpentine or Lherzolyte, or, in Peridot, 
theoretic consequences. Vide Comm.” 
Note.—Subsequent to this, in 1869, I examined what I now call the Archean series of rocks at 
Arisaig, N.S. These had Aveviousdy been regarded as igneous rocks of uncertain (Devonian) age. 
While engaged in the geological survey under the direction of Sir W. E. Logan, I found they were 
altogether different from what we had supposed them to be. I recognized in them rocks corres- 
ponding with the Laurentian rocks as represented in the beautiful series of specimens exhibited 
by the geological survey in the Canadian Department vf the late Paris Exhibition (1867). At 
Arisaig I found crystalline limestones, Ophites, Ophicalcites, Hornblendic rocks, Diorites, Syenites, 
we. Sir W. E. Logan considered that my specimens corresponded with his Quebec series. Dr. T. 
S. Hunt agreed with me in regarding them as Laurentian. Dana, in his Manual, 2nd edition, 
applied the term Archwan to this series 
In 1878 I adopted this term, and have invariably applied it since then to this typical series and 
corresponding rocks. Trans. Ins. 
Application of what proceeds to the mode of formation of our 
globe. Origin of peridot as a “scorie universelle,” like a metal- 
lurgic, not voleanic scoria. 
Absence in the meteorites of stratified rocks and granite. 
The meteorites so analagous to certain rocks of ours differ 
considerably from the greater part of those which form the 
earth’s crust. 
The most important difference consists, in that we do not find 
in the meteorites anything that resembles the constituent mate- 
rial of stratified rocks—e. g., neither arenaceous rocks nor fossil- 
iferous rocks; that is to say, nothing which recalls the action of 
an ocean on these bodies, no more than the presence of life. 
A grand difference reveals itself even when we compare the 
meteorites with the terrestrial rocks not stratified. We never 
find in the meteorites either granites or gneiss, or any of the rocks 
of the same family (the Archean), which form with these the 
general bed upon which the stratified rocks repose. We do not 
even see any of the constituent minerals of the granitic rocks— 
orthoclose, mica or quartz—no more than the tourmaline and 
the other silicates which are accidental to those rocks. 
So the silicate rocks which form the envelope of our globe are 
