It is a received maxim that money invested in Orchids is equal to a chance in a good gold mine. The larger they grow the more they are worth, as they increase but slowly under culture, and there are but few chances of getting stock but by the very expensive plan of sending collectors to tropical regions to hunt for them. The leading English nurserymen send collectors abroad especially to scrape up Orchids to supply the demands of customers. There is a chance now to prove whether the maxim is true in our country as in Europe, as we learn that the very fine collection of Mr. Geo. Howland, of Fish-kill-on-the-Hudson, is for sale. We note some very rare species in the list before us.