The forcing-houses at Senator Cameron's, at Lochiel, near Harrisburg, have their usual Winter's attractions in Cucumbers, Tomatoes, etc. On the 8th of January a visitor informs us at least a bushel of ripe Tomatoes could be had at one picking, not one of the fruit being less than ten inches round. The flavor of these forced tomatoes is singularly delicate, and the flesh mealy. It is amazing that more of our wealthy people do not have these luxuries. Of course it takes skilled gardeners* like Mr. John Paget to do the thing cheaply and well, - but such good gardeners are generally to be had if the proper steps are taken towards finding them.