When I read my first paper on “Recent Mineral-growth at ordinary temperatures” under (what we, perhaps, rather carelessly call) “ordinary conditions,” I was met with the reasonable remark that, time enough had not elapsed for me to be certain of my facts.

Since then, I have had more than three years of affectionate watching in my “Gold-garden” (as Mr. Ruskin pleasantly calls it); and I am glad to say that the interim has been productive of some new and striking spontaneous changes; which, for convenience of expression, I continue to term “mineral-growth.”

I have before me a number of mineralogical facts of much interest, and I propose to notice first, some recent alterations in 47 of the specimens described in the paper referred to; and then to add a few short notes of similar changes in 35 specimens, not therein alluded to.