The "Eight Day Machine" is considered the most powerful, but at the same time the most complicated, of all those invented. One must be familiar with handling it before a full success can be secured. It is owing to this difficulty that the terrible fate intended for London Bridge and its neighborhood was turned aside by the instantaneous killing instead of the two Fenian criminals. The size and appearance of that machine changes, Proteus-like, according to the necessity of smuggling it in, in one or another way, unperceived by the victims. It may be concealed in bread, in a basket of oranges, in a liquid, and so on. The Commission of Experts is said to have declared that its explosive power is such as to reduce to atoms instantly the largest edifice in the world. The "Little Exterminator" is an innocent-looking plain utensil having the shape of a modest jug. It contains neither dynamite nor powder, but secretes, nevertheless, a deadly gas, and has a hardly perceptible clock-work attached to its edge, the needle of which points to the time when that gas will effect its escape. In a shut-up room this new "vril" of lethal kind will _smother to death, nearly instantaneously_, every living being within a distance of a hundred feet radius of the murderous jug. With these three "latest novelties" in the high season of Christian civilization, the catalog of the dynamiters is closed; all the rest belongs to the old "fashion" of the past years. It consists of hats, _porte cigars_, bottles of ordinary kind, and even _ladies' smelling bottles_, filled with dynamite, nitro-glycerin, etc., etc.--weapons, some of which, following unconsciously Karmic law, killed many of the dynamiters in the last Chicago _revolution_. Add to this the forthcoming long-promised Keeley's vibratory force, capable of reducing in a few seconds a dead bullock to a heap of ashes, and then ask yourself if the _Inferno_ of Dante as a locality can ever rival earth in the production of more hellish engines of destruction? Thus, if purely material implements are capable of blowing up, from a few corners, the greatest cities of the globe, provided the murderous weapons are guided by expert hands--what terrible dangers might not arise from magical _occult_ secrets being revealed, and allowed to fall into the possession of ill-meaning persons! A thousand times more dangerous and lethal are these, because neither the criminal hand, nor the _immaterial_ invisible weapon used, can ever be detected. The congenital _black_ magicians--those who, to an innate propensity towards evil, unite highly-developed mediumistic natures--are but too numerous in our age. It is nigh time then that the psychologists and believers, at least, should cease advocating the beauties of publicity and claiming knowledge of the secrets of nature for all. It is not in our age of "suggestion" and "explosives" that Occultism can open wide the doors of its laboratories except to those who _do_ live the life.